; (4) may contract with other parties; (5) may sue or be sued; (6) may be held liable under civil and criminal law; (7) may indemnify the Directors, including the Interim CEO or CEO, and other officers, agents, and employees of the Corporation; and (8) shall have such other corporate powers as are necessary or appropriate to carry out the purposes of this subtitle and of the Corporation. (b) Limitations (1) Business activities The Corporation may only engage in business activities that are— (A) related to carrying out air traffic services; or (B) ancillary or incidental to carrying out such services. (2) Equity shares The Corporation may not issue or sell equity shares in the Corporation. 90313. Charges and fees for air traffic services (a) Assessment and collection of charges and fees Beginning on the date of transfer, and subject to this section and section 90502, the Corporation may assess and collect charges and fees from air traffic services users for air traffic services provided by the Corporation in United States airspace or international airspace delegated to the United States. (b) Board approval of charges and fees The Board shall— (1) approve a proposal for— (A) an initial schedule of charges and fees pursuant to subsection (g); and (B) any change in the charges or fees; (2) provide air traffic services users and other interested persons notice of a proposal approved under paragraph (1) in a manner and form prescribed by the Secretary