“Day care of children” means, subject to paragraphs 14(b) to 17, a service which consists of any form of care (whether or not provided to any extent in the form of an educational activity), supervised by a responsible person and not excepted from this definition by regulations, provided for children, on premises other than domestic premises, during the day (whether or not it is provided on a regular basis or commences or ends during the hours of daylight).