If a claim by an employee of the Senate or House of Representatives arises under section
1311 or
1312 of this title after the effective date of such sections, but before the opening of the Office for receipt of requests for counseling or mediation under sections
1402 and
1403 of this title, the provisions of the Government Employees Rights Act of 1991 and Rule LI of the House of Representatives relating to counseling and mediation shall remain in effect, and the employee may complete under that Act or Rule the requirements for counseling and mediation under sections
1402 and
1403 of this title. If, after counseling and mediation is completed, the Office has not yet opened for the filing of a timely complaint under section
1405 of this title, the employee may elect—