MEAD, J.

[¶ 1] John C. Thomas Sr. appeals from a judgment of conviction entered by the Superior Court (Knox County, Hjelm, J.) following his conditional nolo contendere plea to possession of oversize lobsters (Class D), 12 M.R.S. § 6431(1) (2007),1 and to taking of lobsters by unconventional method (Class D), 12 M.R.S. § 6432(1) (2007).2 Thomas argues that: the court erred in denying his motion to suppress because the State did not have jurisdiction to enforce its lobster laws against him outside Maine's three-nautical-mile territorial waters; the State should have prosecuted him under 12 M.R.S. § 6952-A (2007)3 instead of section 6432, which has a different penalty provision; and he was entitled to use the immediate liberation defense. We affirm the judgment of conviction.

I. BACKGROUND

[¶ 2] John C. Thomas Sr. was the captain of the "F/V Blue Water III," a trawler with a Maine port of hail that carried a Federal Certificate of Documentation, a Northeast Federal Fishing Permit, and a Maine Commercial Fishing with Crew license. David Osier, who had a mailing address in South Bristol, owned the Blue Water and applied for the Maine license.4 The Blue Water regularly fished in federal waters.

[¶ 3] On July 12, 2007, several Maine marine patrol officers located the Blue Water approximately thirty-five miles from Matinicus Island. On that day, the Blue Water was rigged for groundfishing. Thomas and the marine patrol officers were familiar with each other, and Thomas was unhappy that the officers had arrived at his boat. The officers asked to board the Blue Water, and Thomas initially refused them permission because he was fishing in federal waters beyond what he perceived to be their law enforcement jurisdiction. When the officers invoked their federal authority, Thomas allowed them to board, believing that he would be "taken into custody immediately" if he refused a federal inspection.5

[¶ 4] Once aboard the Blue Water, the officers examined plastic totes on the deck of the Blue Water and found seventy-eight lobsters; twenty-four of the lobsters were oversize. A number of them were banded in the totes. Maine law establishes a maximum length for lobsters that may be kept. 12 M.R.S. § 6431(1). Maine law also prohibits taking lobsters by any method other than conventional lobster traps. 12 M.R.S. § 6432(1). Thomas was charged with violating both statutes.

[¶ 5] Thomas filed a motion to suppress the evidence seized by the officers on the grounds that the boarding and searching of the Blue Water were illegal.6 Thomas argued that the State officers had no legal justification to stop and search the Blue Water, and they were only able to board because they invoked their concurrent authority to enforce federal law.

[¶ 6] The Blue Water was in the federal exclusive economic zone (EEZ) at the time of the search. The EEZ extends two hundred nautical miles from where the territorial sea is measured, and "the inner boundary of that zone is a line coterminous with the seaward boundary of each of the coastal States." 16 U.S.C.S. § 1802(11) (LexisNexis 1999); see also Proclamation No. 5030, 48 Fed.Reg. 10,605 (Mar. 14, 1983).

[¶ 7] The Magnuson-Stevens Fishery Conservation and Management Act, 16 U.S.C.S. §§ 1801-1884 (LexisNexis 1999 & Supp.2010), applies in the EEZ. Originally enacted in 1976, the Act aims to "promote domestic commercial and recreational fishing under sound conservation and management principles" and "to provide for the preparation and implementation . . . of fishery management plans which will achieve and maintain, on a continuing basis, the optimum yield from each fishery." 16 U.S.C.S. § 1801(b)(3), (4). Although Maine's territorial waters extend only three nautical miles from the coast, 12 M.R.S. § 6001(48-B) (2009), the Magnuson-Stevens Act allows a state to regulate a fishing vessel outside the boundaries of that state when that vessel is registered under the law of that state, and there is no conflict with federal law. 16 U.S.C.S. § 1856(a)(3)(A).7 The Magnuson-Stevens Act does not define what it means to be "registered" in a particular state.

[¶ 8] The definition of "registered vessel" is expansive in Maine marine resources law.8 The court found that the Blue Water was registered under the laws of Maine pursuant to at least three of the statutory criteria. First, the Blue Water is "used to bring a marine organism into the State or its territorial waters" pursuant to paragraph (B), because the Blue Water has landed its catch in Portland. Second, the Blue Water's port of hail is South Bristol, and the Federal Certificate of Documentation cites Medomak as the vessel's hailing port, so the Blue Water is within paragraph (D). Third, the Blue Water has "an established base of operations" in Maine pursuant to paragraph (F), because its owner was a South Bristol entity or individual, its hailing port was in Maine, and a Maine resident applied for and received a Maine state license for the Blue Water.

[¶ 9] The court denied Thomas's motion to suppress, finding that the officers had an independent legal basis to search the Blue Water, because Maine law requires a person licensed under the marine resource laws "to submit to inspection and search for violations related to the licensed activities by a marine patrol officer." 12 M.R.S. § 6306(1) (2007).9 The court held that section 6306 applied to the Blue Water in the EEZ because the Blue Water was a vessel registered under the laws of Maine. See 16 U.S.C.S. § 1856(a)(3). Therefore, neither Thomas's consent nor probable cause was necessary to allow the search.

[¶ 10] Thomas filed a motion for reconsideration on the basis that there was no articulable suspicion that he had violated any marine resources statute, so, pursuant to 12 M.R.S. § 6025(4) (2009),10 the marine patrol officers illegally searched the Blue Water without a warrant. The court denied this motion and reiterated that the basis for the denial of the motion to suppress was section 6306, which provides an independent basis for searching a vessel licensed under Maine's marine resources laws. The court sentenced Thomas to a $7850 fine on the charge of taking lobsters by unconventional means and a $1125 fine on the charge of possession of oversize lobsters; payment of the fines was suspended pending this appeal.

[¶ 11] On appeal, Thomas argues that the court erred in denying his motion to suppress, the State should have prosecuted him under section 6952-A instead of section 6432, and he was entitled to use the defense of immediate liberation.

II. DISCUSSION

A. Thomas's Motion to Suppress

[¶ 12] In reviewing the denial of a motion to suppress, we review the court's factual findings for clear error and its legal conclusions de novo. State v. Nadeau, 2010 ME 71, ¶ 15, 1 A.3d 445, 453. Thomas challenges the court's finding on the ownership of the Blue Water, as well as the validity of Maine's "registered vessel" definition and the constitutionality of the jurisdiction it permits.

1. Ownership of the Blue Water

[¶ 13] Thomas contends that the Blue Water was not subject to search pursuant to section 6306's implied consent provision, because Osier was not the actual owner of the Blue Water. If section 6306 did not apply, section 6025(4), which requires probable cause to justify a search, would apply instead.

[¶ 14] The court relied on Thomas's testimony that Osier owned the Blue Water. Although Thomas's counsel now alleges this testimony was mistaken, there is nothing in the record that establishes such a mistake. The court was entitled to accept Thomas's testimony whether or not the record contained evidence to the contrary. For clear error review, we will not disturb the court's factual findings if they are "supported by competent evidence in the record." Efstathiou v. Aspinquid, Inc., 2008 ME 145, ¶ 35, 956 A.2d 110, 121. As the court did not err in finding that Osier owned the Blue Water and held a Maine license, the vessel was properly subject to inspection under section 6306.

2. Maine's Definition of "Registered Vessel"

[¶ 15] Thomas argues that Maine's definition of "registered vessel" in section 6001(36) is impermissibly broad when used as a basis for state jurisdiction in the EEZ. 12 M.R.S. § 6001(36) (2009). He asserts that the definition of "registered vessel" should be construed narrowly so that Maine would not be able to exert jurisdiction over the Blue Water in the EEZ pursuant to § 1856(a)(3) of the Magnuson-Stevens Act.11

[¶ 16] The Magnuson-Stevens Act allows a state to enact more restrictive marine resource laws to be enforced in the EEZ against vessels registered in that state. See Daley v. Comm'r, Dep't of Marine Res., 1997 ME 183, ¶ 6, 698 A.2d 1053, 1056 ("[T]he federal lobster management plan contains no limit on the number of traps that may be fished, authorizes concurrent state jurisdiction, and expressly allows the enforcement of more restrictive state law requirements." (footnote omitted)); State v. Hayes, 603 A.2d 869, 871 (Me.1992) ("Here, Congress has authorized enforcement of more restrictive state fishing laws within the EEZ.").

[¶ 17] Thomas warns that section 6001(36) allows Maine to exercise jurisdiction over almost any vessel fishing in the EEZ off the Maine coast even when such vessels have remote or tenuous connections to the state. Even if such policy arguments had a place in judicial reviews, Thomas's arguments are not supported by this record. Because it is clear the Blue Water was a Maine "registered vessel" under at least three of the six options listed in section 6001(36),12 the Blue Water's connection to Maine is neither remote nor tenuous.

[¶ 18] When Congress enacted the Magnuson-Stevens Act, it did not enumerate specific requirements for making the exercise of state jurisdiction in the EEZ lawful. Instead, the language of § 1856(a) allows individual states to determine which fishing vessels are "registered." See People v. Weeren, 26 Cal.3d 654, 163 Cal.Rptr. 255, 607 P.2d 1279, 1287, cert. denied, 449 U.S. 839, 101 S.Ct. 115, 66 L.Ed.2d 45 (1980). Section 6001(36), which allows for broader enforcement of Maine's marine resource laws, serves important conservation goals and does not conflict with the Magnuson-Stevens Act.

[¶ 19] Thomas also argues that Maine's enforcement of its marine resource laws in the EEZ results in discrimination in enforcement against Maine citizens in violation of the Equal Protection Clause. Thomas "bears a heavy burden of proving unconstitutionality since all acts of the Legislature are presumed constitutional," and we review whether he has met that burden de novo. State v. Gilman, 2010 ME 35, ¶ 13, 993 A.2d 14, 19 (quotation marks omitted).

[¶ 20] We have previously addressed constitutional challenges to the State's exercise of jurisdiction in the EEZ. Hayes, 603 A.2d at 871. The State's enforcement of its marine resource laws against only Maine registered vessels does not violate equal protection, because this limitation on jurisdiction reflects a delineation of the outer bounds of Maine's sovereignty rather than the creation of a suspect classification. See id. The fact that the Maine Legislature has elected to enact strict marine resource protection laws that it can enforce only against Maine-registered vessels in the EEZ is an issue of legislative policy and prerogative, which is beyond the authority of the court to review.

B. Prosecution Under 12 M.R.S. § 6432 (2007)

[¶ 21] Thomas argues that he should have been prosecuted under section 6952-A, "Trawling, seining or netting for lobster," instead of section 6432, "Methods of fishing." We will review the issue of whether the same conduct may violate more than one statute de novo as a matter of statutory interpretation. See State v. Raymond, 1999 ME 126, ¶ 6, 737 A.2d 554, 555.

[¶ 22] Although both section 6432 and section 6952-A provide for the same punishment now, in 2007, section 6952-A did not have a penalty section, so the penalty was dictated by 12 M.R.S. § 6204 (2009).13 Specifically, section 6952-A did not have the per-lobster fine that was available for violations of section 6432. Section 6952-A also has a defense available for the immediate release into coastal waters.

[¶ 23] Generally, a prosecutor has discretion in deciding which offense to charge when the same conduct gives rise to more than one offense, absent a plain, contrary legislative intent. See 17-A M.R.S. § 13 (2009); State v. Jones, 405 A.2d 149, 152 (Me.1979). The available penalties may influence the prosecutor's decision, and this fact alone does not amount to a constitutional violation. United States v. Batchelder, 442 U.S. 114, 124-25, 99 S.Ct. 2198, 60 L.Ed.2d 755 (1979).

[¶ 24] On an appeal from a conviction for an older version of the statute, we held that "sweeping [lobsters] in as an incident of trawling for other fish and failing to liberate them alive . . . is squarely within the hard core of conduct which it is the primary legitimate concern of the statute to prohibit, thereby effectively to achieve the State's lobster conservation purposes." State v. Richardson, 285 A.2d 842, 846 (Me.1972). Thomas's conduct is within both the letter and spirit of sections 6432 and 6952-A.

[¶ 25] Thomas argues that section 6432, if applicable to his conduct, would create legal problems for nearly all groundfish trawlers due to the possibility of incidental take of lobsters with their legal catch. In Thomas's case the violation was clear: the lobsters were in storage in totes, and some were already banded. His possession of the lobsters was hardly momentary or simply incidental to hauling back the trawl. Thus we need not reach the specter he raises of criminal liability attaching for the momentary and de minimis possession of lobsters incidentally snared in trawling nets.

C. Immediate Liberation Defense

[¶ 26] Thomas argues that he could not be guilty of possession of oversize lobsters until he failed to comply with the exception for immediate liberation in section 6431(5). This is an exception to liability for those who "immediately liberate[]" illegal lobsters "alive into the coastal waters when taken." 12 M.R.S. § 6431(5) (2007).

[¶ 27] We review factual findings for clear error and the application of the law to those facts de novo. See State v. Reynoso-Hernandez, 2003 ME 19, ¶¶ 10, 11, 816 A.2d 826, 830.

[¶ 28] Because the parties stipulated that at least some of the lobsters were banded and in storage in totes, the trial court found that Thomas did not free the lobsters as soon as he found them in the Blue Water's catch and concluded that the defense of immediate liberation did not apply. In the context of the statute's conservation purpose, see Richardson, 285 A.2d at 846-47, we agree and note that the statutory exception is narrowly designed to allow for incidental catch while fishing as long as the lobsters are immediately released alive.

[¶ 29] Thomas argues that "coastal waters," as used in section 6431(5), means within three miles of the coast, so he could not have violated the prohibition on oversize lobsters until he entered this area and then failed to immediately liberate the illegal lobsters alive. "Coastal waters" is defined as extending "out to the limits of the exclusive economic zone." 12 M.R.S. § 6001(6) (2009). We do not find, as Thomas suggests, that this refers to the inner limit of the EEZ where the EEZ meets Maine's territorial waters. The plain language of the statute clearly refers to the outer limit of the EEZ. Further, the marine resources laws define "territorial waters" as those waters "seaward to the 3-nautical-mile line." 12 M.R.S. § 6001(48-B). We will not interpret "coastal waters" to obliterate the distinction between these two terms. See Nasberg v. City of Augusta, 662 A.2d 227, 229 (Me.1995).

III. CONCLUSION

[¶ 30] In summary, we uphold the constitutionality of the search of the Blue Water pursuant to section 6306; because the Blue Water was a vessel registered under the laws of Maine at the time of the search, the State validly exercised jurisdiction over it in the EEZ pursuant to the Magnuson-Stevens Act. Further, the State could choose whether to prosecute Thomas under section 6432 or section 6952-A, and the court did not err in holding that the immediate liberation defense requires a person who inadvertently catches lobsters while trawling to release the lobsters immediately.

The entry is:

Judgment affirmed.