Michael K. Deaver, former White House deputy chief of staff, is being investigated by the General Accounting Office, which is looking into Deaver's lobbying on behalf of the government of Canada on acid rain, an issue that he worked on in the White House. The GAO is also investigating whether Deaver explored the possibility of representing Canada as a lobbyist while still working in the White House. Five Democrats on the Senate Judiciary Committee have asked the Justice Department to appoint an independent counsel to investigate these and other aspects of Deaver's lobbying activities, including a recent meeting with budget director James C. Miller III on behalf of a client, Rockwell International, which wants the administration to build more B1 bombers. Deaver, whose firm has millions of dollars in retainers from foreign and domestic clients, has denied doing anything unethical or improper.

Last year, Deaver used his diplomatic passport to try to buy a BMW luxury car at about a 25 percent discount while on an official trip to West Germany. In 1983, a federal review cleared Deaver of any conflict of interest for signing a contract to write a diet book while working at the White House.

Lyn Nofziger, a former White House aide, represented a former Louisiana official convicted of extortion and racketeering in his successful effort to persuade President Reagan to commute his 18-year prison sentence. Nofziger, a longtime Reagan confidant, was an unpaid consultant to Reagan's 1984 campaign at the time.

Daniel M. Hughes, former deputy undersecretary of housing and urban development, urged HUD officials to approve an Urban Development Action Grant involving his new development firm. The grant was awarded in 1984 over the objections of HUD's career staff.