Under FISA, any agency may require a common carrier, landlord, custodian, or other person provide them with all information, facilities, or technical assistance necessary to accomplish ongoing electronic surveillance. They must also protect the secrecy of and cause as little disruption to the ongoing surveillance effort as possible. This was further tightened in . further limited the sort of assistance an agency may require, and provided for compensation of any person who rendered surveillance assistance to the government agency. allows for legal immunity to any provider of a wire or electronic communication service, landlord, custodian, or other person that provides any information, facilities, or technical assistance in accordance with a court order or request for emergency assistance.