Such execution and the expenses thereof shall, when served by the officer to whom delivered for collection in the manner hereinafter provided, upon the state, a state agency or political subdivision from which such money is due or may thereafter become due to the judgment debtor, become a lien and continuing levy upon the sums due or to become due to the judgment debtor within one year after the issuance of the same (but not to exceed twenty per centum of the salary or wages due to such judgment debtor or reduce the amount received by him per week to an amount less than thirty times the federal minimum hourly wage then in effect) unless sooner satisfied and paid, vacated or modified as hereinafter provided.
Where more than one suggestee execution shall have been issued pursuant to the provisions of this section against the same judgment debtor, they shall be satisfied in the order of priority in which they are served upon the state, state agency or political subdivision from which such money is due or shall become due. For purposes of determining such priority the time that an execution served by mail, as hereinafter provided shall be received, and not the time of admission of service shall control. In the case of two or more executions received in the same mail delivery priority shall be accorded the one first issued.