(g) At any time after January 1, 1972, by vote of a majority of the members elected to each of the 2 houses of the legislature, the legislature may declare that an emergency exists and submit to the people a proposal to authorize the state to contract a specific amount of public debt for a purpose specified in such proposal, without regard to the limit provided in paragraph (b). Any such authorization shall be effective if approved by a majority of the electors voting thereon. Public debt contracted pursuant to such authorization shall thereafter be deemed to have been contracted pursuant to paragraph (a), but neither such public debt nor any public debt contracted to fund or refund such public debt shall be considered in computing the debt limit provided in paragraph (b). Not more than one such authorization shall be thus made in any 2−year period.