The government will abolish its mandatory 70 retirement age next September. But workers who reach their 70th birthday before Sept. 1 will still be forced to retire unless they get special waiverg.

Uncle Sam has hundreds of "reemployed annuitants" working, mostly on short-term projects. When the retired civil servants take new jobs with government their pay is reduced by the amount of their pension.

Currently, only about 13 regular government workers - most of them administrative law judges - are now working past the age 70 cutoff on special exemptions. After Sept. 1 that mandatory age for retirement will be eliminated except for people in law enforcement and some special jobs.

Navy Changes; navy soon will announce a reorganization of its civilian personnel management functions. The move is expected to put personnel director Bill Paz at the assistant secretary level, a noncareer job.

Navy Secretary W. Graham Claytor Jr. believes it will strengthn civilian clout in making manpower decisions and better coordinate military job planning for the Navy's 300,000 civilian workers. Paz, a 27-year career man, will be succeeded by his deputy Tom Muir, according to the plan.

Most of the 500 Navy civilians here now with the Office of Civilian Manpower Management will be put in a new organization under the Chief of Naval Operations. Some will be moved in the Northern Virginia area. Nobody will be shifted outside Metro Washington, insiders say, and no downgradings or layoffs will follow the reogranization.

Battered Women: The Federal Women's Program at Social Security's Bureau of Hearing and Appeals will have a panel discussion April 18 on the problem of spouse beating. It will be at the Webb Building in Arlington beginning at noon.

Reform Backlash: Two major local units of the American Federation of Government Employes union have blasted AFGE's national office for its support of the Carter civil service "reform" plan. Both the National Capital Area Department and the big Pentagon Local 2 of AFGE warn that "reform" may be a coverup for methods to make it easier to fire politically uncooperative bureaucrats.

Hatch Act: Common Cause says it supports the President's civil service reforms but is opposed to the White House-backed plan to allow federal and postal employes to get into partisan politics.

The House has passed legislation that would revise the 39-year-old "no politics" law, but it is bogged down in the Senate Governmental Affairs Committee. Union leaders - who want the Hatch Act modifications - believe they can persuade Sen. Edmund Muskie (D-Maine) to floor manage the bill once he is convinced they have the votes to choke off a filibuster.