Looks like if South Carolina D.N.R. Officer Eric Vaughn fishes, he also violated South Carolina law!
(B) It is unlawful to obtain, attempt to obtain, or possess a South Carolina resident saltwater license while licensed for any purpose as a resident of another state.
South Carolina Code of Laws
SECTION 50-5-305. Requirements for obtaining resident license; penalty.
(A) To be granted a resident commercial saltwater license authorized under this chapter:
(1) an applicant must present a statement from the South Carolina Department of Revenue indicating the applicant filed a South Carolina income tax form as a resident for the previous calendar year, but a person under the age of seventeen is exempt from the requirement to provide such statement; or
(2) an applicant who did not file a South Carolina personal income tax form for the previous year must show documentation acceptable to the department proving the applicant was a resident of South Carolina for twelve consecutive months immediately prior to the date of application.
The applicant must also present an additional form of identification acceptable to the department.
(B) It is unlawful to obtain, attempt to obtain, or possess a South Carolina resident saltwater license while licensed for any purpose as a resident of another state.
(C) A person who violates this section is guilty of a misdemeanor and, upon conviction, must be fined not less than two hundred dollars nor more than two thousand five hundred dollars or imprisoned for not more than thirty days and must have his saltwater privileges suspended for twelve months.
http://www.scstatehouse.gov/CODE/t50c005.htm