health care provider.)
Son or daughter means a biological, adopted, or foster child; a stepchild; a legal ward; or a child of a person standing in loco parentis who is--
(1)  Under 18 years of age; or
(2)  18 years of age or older and incapable of self-care because of a mental or physical disability.  A son or daughter incapable of self-care requires active assistance or supervision to provide daily self-care in three or more of the "activities of daily living" (ADL's) or "instrumental activities of daily living" (IADL's).  Activities of daily living include adaptive activities such as caring appropriately for one's grooming and hygiene, bathing, dressing, and eating.  Instrumental activities of daily living include cooking, cleaning, shopping, taking public transportation, paying bills, maintaining a residence, using the telephones and directories, using a post office, etc.  A "physical or mental disability" refers to a physical or mental impairment that substantially limits one or more of the major life activities of an individual as defined in 29 CFR 1630.2(h), (i),
and (j).
Spouse means an individual who is a husband or wife pursuant to a marriage that is a legal union between one man and one woman, including common law marriage between one man and one woman in States where it is recognized. 
*    *    *    *    *
10.  In § 630.1203, paragraphs (a)(4), (b), (c), (d), (g), and (h) are revised to read as follows:

§ 630.1203  Leave entitlement.

(a)    *    *    *
(4)  A serious health condition of the employee that makes the employee unable to perform any one or more of the essential functions of his or her position. 
(b) An employee shall invoke his or her entitlement to family or medical leave under paragraph (a) of this section, subject to the notification and medical certification requirements in §§ 630.1206 and 630.1207.  An employee may take only the amount of family and medical leave that is necessary to manage the circumstances that prompted the need for leave under paragraph (a) of this section.
(c)  The 12-month period referred to in paragraph (a) of this section begins on the date an employee first takes leave for a family or medical need specified in paragraph (a) of this section and continues for 12 months.  An employee is not entitled to 12 additional workweeks of leave until the previous 12-month period ends and an event or situation occurs that entitles the employee to another period of family or medical leave.  (This may include a continuation of a previous situation or circumstance.)
(d)  The entitlement to leave under paragraphs (a)(1) and (2) of this section shall expire at the end of the 12-month period beginning on the date of birth or placement.  Leave for a birth or placement must be concluded within this 12-month period.  Leave taken under paragraphs (a)(1) and (2) of this