47 U.S. Code § 765a - Signatory role
(a) Limitations on signatories
(1) National security limitations
The Federal Communications Commission, after a public interest determination, in consultation with the executive branch, may restrict foreign ownership of a United States signatory if the Commission determines that not to do so would constitute a threat to national security.
(b) Clarification of privileges and immunities of COMSAT
(1) Generally not immunized
Notwithstanding any other law or executive agreement, COMSAT shall not be entitled to any privileges or immunities under the laws of the United States or any State on the basis of its status as a signatory of INTELSAT or Inmarsat.
(2) Limited immunity
COMSAT or any successor in interest shall not be liable for action taken by it in carrying out the specific, written instruction of the United States issued in connection with its relationships and activities with foreign governments, international entities, and the intergovernmental satellite organizations.
(3) No joint or several liability
If COMSAT is found liable for any action taken in its status as a signatory or a representative of the party to INTELSAT, any such liability shall be limited to the portion of the judgment that corresponds to COMSAT’s percentage of the ownership of INTELSAT at the time the activity began which lead to the liability.
(c) Parity of treatment
Notwithstanding any other law or executive agreement, the Commission shall have the authority to impose similar regulatory fees on the United States signatory which it imposes on other entities providing similar services.
 See References in Text note below.
Source(Pub. L. 87–624, title VI, § 642, as added Pub. L. 106–180, § 3,Mar. 17, 2000, 114 Stat. 55.)
References in Text