Any other person owned or controlled by or acting on behalf of any person described in subparagraphs (A) through (C). (2) 2019 novel coronavirus In this subsection, the term 2019 novel coronavirus means the coronavirus disease (COVID–19) and severe acute respiratory syndrome coronavirus 2 (SARS–CoV–2). 4. Powers (a) Hearings and other activities For the purpose of carrying out its duties, the Joint Select Committee may hold such hearings and undertake such other activities as the Joint Select Committee determines to be necessary to carry out its duties, whether the Congress is in session, has recessed, or has adjourned. (b) Authority To use subpoenas The Joint Select Committee may require by subpoena the attendance of such witnesses and the production of such books, papers, and documents, as it considers appropriate. (c) Access to legislative branch services The Joint Select Committee shall have access to the services of the Government Accountability Office, the Congressional Budget Office, and the Congressional Research Service in the same manner and under the same terms and conditions as any standing committee of the House of Representatives or Senate. (d) Adoption of Rules Not later than 7 days after all of its members have been appointed, the Joint Select Committee shall adopt rules governing its operations, including rules governing the issuance of subpoenas and rules governing the use of official funds for travel by members and staff, and shall submit such rules to the Clerk of the House of Representatives and Secretary of the Senate for publication in the Congressional Record. 5. Staff