Section 192. The department of public health shall enforce sections one hundred and eighty-six to one hundred and ninety-five, inclusive. Local boards of health shall enforce only sections one hundred and eighty-six to one hundred and ninety-five, inclusive, as they pertain to food. Said department, after a public hearing, shall adopt and promulgate rules and regulations consistent with said sections, and, except as to standards fixed by law, may adopt standards, tolerances and definitions of purity or quality or identity for articles of food, drugs or devices, and may adopt rules and regulations consistent with said section for cosmetics. Such standards, tolerances and definitions shall conform to the standards, tolerances and definitions, if any, of purity or quality or identity adopted or that may hereafter be adopted for the enforcement of the federal food, drug and cosmetic act, approved June twenty-fifth, nineteen hundred and thirty-eight (Title 21, USC 301 et seq., 52 Stat. 1040 et seq.), or now or hereafter adopted for the enforcement of federal law.