Citing examples of what amounts to banking across state lines in the region, the District of Columbia Bankers Association has renewed its call for a test of interstate banking in metropolitan Washington.

The DCBA reaffirmed its position on interstate banking in a strongly worded resolution concluding its 65th annual meeting, held here last week.

In adopting the resolution, DCBA members also reaffirmed support for industry and legislative efforts toward further deregulation.

The resolution calling for an amendment of laws prohibiting interstate banking contained a carefully worded statement intended to win support among bankers associations in Maryland and Virginia, and the D.C. City Council.

While Washington-based banks are restricted to the narrow confines of the District, major Maryland and Virginia banks enjoy an advantage of providing banking services in the suburbs, areas which District banks consider part of their natural marketplace. At the same time several national financial institutions operate throughout the metropolitan Washington market, the DCBA pointed out in its resolution.

With the deregulatory climate considerably more favorable now than it was 10 years ago when they sought to cross state lines, District bankers now believe they have a better chance of achieving their goal.

In another resolution dealing with deregulation, the DCBA pledged support for industry efforts to reduce the number of federal financial regulatory agencies to three.

The resolution called for a new structure in which the Federal Reserve Board would continue to set monetary policy and oversee other functions essential to its role as the nation's central bank.

But the DCBA supports a system in which there would be only one agency to insure all financial institutions and one that would regulate all national and federally insured financial institutions.

Currently banks and savings and loan associations are regulated and insured by different agencies. But with few differences separating banks and thrifts after passage of legislation deregulating financial institutions last year, support has grown for consolidation of regulatory function.

On an unrelated subject, the DCBA unanimously adopted a resolution calling for legislation establishing a uniform minimum wage rate for all District employes. It also calls for adherence to the federal minimum wage standard in order to "foster a healthy business climate for existing and prospective businesses."

The DCBA contends that the District's wage structure (the city's highest minimum is $3.90) has discouraged businesses from either expanding or locating in the city.

The DCBA also elected George A. Didden III as president of the association.

Didden, who had been first vice president of the bankers association and a member of its council of administration for the past six years, is senior vice president of the National Capital Bank of Washington.

Also elected to one-year terms as officers of the D.C. Bankers Association were James F. Rogers, executive vice president of American Security Bank, first vice president; Michael F. Ryan, executive vice president of NS&T Bank, second vice president, and B. Doyle Mitchell, chairman and president of Industrial Bank of Washington, treasurer.

In other resolutions that were adopted at this year's meeting, the DCBA pledged support for a new banking curriculum in the D.C. public schools.