Passage: The Secretariat of Rajya Sabha was set up pursuant to the provisions contained in Article 98 of the Constitution. The said Article, which provides for a separate secretarial staff for each House of Parliament, reads as follows:- 98. Secretariat of Parliament – Each House of Parliament shall have a separate secretarial staff: Provided that nothing in this clause shall be construed as preventing the creation of posts common to both Houses of Parliament. (2) Parliament may by law regulate the recruitment and the conditions of service of persons appointed to the secretarial staff of either House of Parliament.

Question: which house can parliament regulate recruitment of people in?
House of Parliament