All laws dealing with the eligibility of members of the Supreme Court to assume duties and obligations, and to claim and receive benefits, as supernumerary justices, are, as to all persons who were eligible to assume such duties and obligations and claim and receive such benefits as of September 18, 1973, continued in full force and effect, and shall not be repealed by the adoption of this code. But at such time as all persons who became vested with eligibility, either present or prospective, to assume duties and responsibilities, and to claim and receive benefits, as, or in the case of surviving spouses, on account of, supernumerary justices as of September 18, 1973, are deceased, all such laws shall thereupon be repealed.