to use the earned paid sick time and earn additional paid sick time at the recommencement of employment with the rail carrier. (8) Prohibition A rail carrier may not require, as a condition of providing paid sick time under this section, that the rail carrier employee involved search for or find a replacement to cover the hours during which the rail carrier employee is using paid sick time. (b) Uses Paid sick time earned under subsection (a) may be used by a rail carrier employee for any of the following: (1) An absence resulting from a physical or mental illness, injury, or medical condition of the rail carrier employee. (2) An absence resulting from obtaining professional medical diagnosis or care, or preventive medical care, for the rail carrier employee. (3) An absence for the purpose of caring for a child, a parent, a spouse, a domestic partner, or any other individual related by blood or affinity whose close association with the rail carrier employee is the equivalent of a family relationship who— (A) has any of the conditions or needs for diagnosis or care described in paragraph (1) or (2)