(1) Dwellings containing three apartments or less, one of which apartments is occupied by an elderly or infirm person for whom the presence of children would constitute a hardship. For purposes of this subsection, an ''elderly person'' shall mean a person sixty-five years of age or over, and an ''infirm person'' shall mean a person who is disabled or suffering from a chronic illness.
(2) The temporary leasing or temporary subleasing of a single family dwelling, a single apartment, or a single unit of a condominium or housing cooperative, by the owner of such dwelling, apartment, or unit, or in the case of a subleasing, by the sublessor thereof, who ordinarily occupies the dwelling, apartment, or unit as his or her principal place of residence. For purposes of this subsection, the term ''temporary leasing'' shall mean leasing during a period of the owner's or sublessor's absence not to exceed one year.
(3) The leasing of a single dwelling unit in a two family dwelling, the other occupancy unit of which is occupied by the owner as his residence.
11A. For an employer, or an employer's agent, to refuse to restore certain employees to employment following an absence by reason of a parental leave taken pursuant to section 105D of chapter 149 or to otherwise fail to comply with that section, or for the commonwealth and any of its boards, departments and commissions to deny vacation credit to an employee for the fiscal year during which the employee is absent due to a parental leave taken pursuant to said section 105D of said chapter 149, or to impose any other penalty as a result of a parental leave of absence.