(b) Any person who violates this section and in so doing removes the minor child from this state or conceals the minor child in another state shall be guilty of a felony, and, upon conviction thereof, shall be imprisoned in the penitentiary not less than one nor more than five years, or fined not more than one thousand dollars, or both fined and imprisoned.
(c) It shall be a defense under this section that the accused reasonably believed such action was necessary to preserve the welfare of the minor child. The mere failure to return a minor child at the expiration of any lawful custody or visitation period without the intent to deprive another person of lawful custody or visitation rights shall not constitute an offense under this section.