(a) All Town ordinances, except as specified in section 110 of this charter, may be repealed by vote of the Town as follows:  A petition signed by not less than 15 percent of the registered voters shall be filed with the Town Clerk requesting a vote on the question of repealing the ordinance. The selectmen shall call a special Town Meeting to be held within 60 days of the date of the filing of the petition, to vote on whether the ordinance shall be repealed.

(b) Within 30 days after passage of an ordinance, 15 percent of the registered voters shall constitute sufficient signatures for referendum petition, and any other procedures of section 108(a) of this charter apply.