(a) Except as otherwise specifically provided in subsection (b) of this section, any person who in the District of Columbia —
(1) willfully possesses, sells, distributes, manufactures, or assembles an intercepting device, the design of which renders it primarily useful for the purpose of the surreptitious interception of a wire or oral communication; or
(2) willfully places in any newspaper, magazine, handbill, or other publication any advertisement of —
(A) any intercepting device, the design of which renders it primarily useful for the purpose of the surreptitious interception of a wire or oral communication; or
(B) any intercepting device where such advertisement promotes the use of such device for the purpose of the surreptitious interception of a wire or oral communication;
(b) It shall not be unlawful under this section for —
(1) a communication common carrier or an officer, agent, or employee of, or a person under contract with a communication common carrier, in the usual course of the communication common carrier’s business; or
(2) a person under contract with the Government of the United States, a State or a political subdivision thereof, or the District of Columbia, or an officer, agent, or employee of the Government of the United States, a State or a political subdivision thereof, or the District of Columbia;