A public interest law firm in Mt. Pleasant has submitted a letter to the city urging them to change a law about allowing the drive-thru to stay open at Taco Boy. The Institute for Justice law firm sent a letter yesterday calling on Mt. Pleasant to end the zoning ordinance and allow Taco Boy’s owner Robert Baltierrez to continue operating the restaurant. Mr. Baltierrez applied for an exemption, but the city denied the request.