4. The maintenance and repair work referred to in section 3 may also be performed voluntarily, without a certificate or exemption, for the benefit of(1) a natural person, with respect to a duplex, a triplex or a quadruplex owned and occupied by the person;
(2) the syndicate of a divided co-ownership of not more than 4 dwelling units, with respect to the common portions of the co-ownership;
(3) a non-profit organization not referred to in subparagraph 2 of the first paragraph of section 2, for purposes useful to that organization’s mission;
(4) a school service centre, a school board or a college referred to in the Act respecting the process of negotiation of the collective agreements in the public and parapublic sectors (chapter R-8.2), a public institution referred to in the Act respecting health services and social services (chapter S-4.2) or in the Act respecting health services and social services for Cree Native persons (chapter S-5), a private educational institution referred to in the Act respecting private education (chapter E-9.1), a housing cooperative constituted under the Cooperatives Act (chapter C-67.2) or a childcare centre, with respect to its buildings; or (5) a person who operates an enterprise that has less than 10 employees, with respect to the premises in which the person operates or intends to operate the enterprise.