§ 375. Requirement of certificate or license to board children. Except for relatives within the second degree or third degree of the parents of a child or children, relatives within the second degree or third degree of the step-parent of a child or children, legally appointed guardians, schools and academies meeting the requirements of the education law as to compulsory education, camps operated for profit for the accommodation of school age children during school vacation periods under permits issued by health officers pursuant to chapter seven of the state sanitary code, and persons with whom a child or children are placed out, no person shall receive, board or keep any child under the age of eighteen years unless certified or licensed to do so as provided in this title.