; and (2) the employer may not change such paid leave on or after such date of enactment to avoid being subject to paragraph (1). (e) Prohibition An employer may not require, as a condition of providing paid sick time under this Act, that the employee involved search for or find a replacement employee to cover the hours during which the employee is using paid sick time. (f) Use of paid sick time (1) In general The paid sick time under subsection (a) shall be available for immediate use by the employee for the purposes described in such subsection, regardless of how long the employee has been employed by an employer. (2) Sequencing (A) In general An employee may first use the paid sick time under subsection (a) for the purposes described in such subsection. (B) Prohibition An employer may not require an employee to use other paid leave provided by the employer to the employee before the employee uses the paid sick time under subsection (a). 203. Notice (a) In general Each employer shall post and keep posted, in conspicuous places on the premises of the employer where notices to employees are customarily posted, a notice, to be prepared or approved by the Secretary of Labor, of the requirements described in this Act. (b) Model notice Not later than 7 days after the date of enactment of this Act, the Secretary of Labor shall make publicly available a model of a notice that meets the requirements of subsection (a). 204. Prohibited acts (a) Interference with rights (1) Exercise of rights It shall be unlawful for any employer to interfere with, restrain, or deny the exercise of, or the attempt to exercise, any right provided under this Act, including— (A) discharging or discriminating against (including retaliating against) any individual, including a job applicant, for exercising, or attempting to exercise, any right provided under this Act