‘7. Statewide and county referendum; municipal vote. After January 1, 2011, any proposed casino or slot machine facility may not be issued a license unless it has been approved by a statewide referendum vote and a vote of the municipal officers or municipality in which the casino or slot machine facility is to be located , except that a commercial track licensed to operate slot machines on January 1, 2011 is only required, as a condition to obtain a casino license, to receive approval to operate a casino by means of a referendum of the voters of the county in which the casino is to be located, held in the same manner and at the same time as the election of county commissioners pursuant to Title 30-A, section 61, subsection 2.’