When nominations at the state primaries are in apparent conformity with law, they shall be valid unless written objections are made thereto in accordance with the provisions of chapter fifty-five B. A person nominated at such primaries may withdraw his name from nomination by a request signed and duly acknowledged by him and filed with the state secretary within the time prescribed in said chapter fifty-five B for filing objections to such nominations.
Mass. Gen. Laws ch. 53, § 53A