Notwithstanding the provisions of subsections (a) and (b) of § 31-23 in effect prior to June 2, 2008, any minor who reached the age of fifteen and was employed, on or after October 1, 2007, as a bagger, cashier or stock clerk shall be deemed to have been lawfully employed, provided such employment was in accordance with the provisions of subparagraphs (A) to (D), inclusive, of subdivision (1) of subsection (b) of said § 31-23. Any person who employed such minor shall not be deemed (1) to have violated the provisions of subsection (a) of said § 31-23, or (2) subject to the penalties of § 31-15a or 31-69a.