If, by or pursuant to the laws of the state of the owner’s primary residence, an owner licenses in that owner’s own state of residence, then such dog shall not need an additional license in this State.
77 Del. Laws, c. 179, § 2; 70 Del. Laws, c. 186, § 1; 77 Del. Laws, c. 428, § 6; 80 Del. Laws, c. 248, § 5.