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The agency will also have an electrical inspector on hand to make sure temporary electrical work and connections are up to code, according to Mr. Gil.

The city’s presence at the stadium could enter the political realm, but in a more orderly fashion than the dispute between former Mayor Adrian M. Fenty and the D.C. Council over the allotment of tickets to a luxury box at the stadium.

Mr. Gray’s chief of staff, Christopher Murphy, said the Nationals may offer postseason tickets to Mr. Gray and D.C. Council Chairman Phil Mendelson.

“They put feelers out to see whether the mayor and chairman could attend, in their official capacities, as leaders of the city,” Mr. Murphy said Wednesday. “They are putting this through their own ethics counsel. We would do the same, to make sure it’s completely appropriate. We wouldn’t do so otherwise.”

Mr. Gray, a baseball fanatic, is already there in spirit.

“Wouldn’t it be something if we had a World Series between the Nationals and the [Baltimore] Orioles?” Mr. Gray told a crowd at his press event in Ward 7. “You talk about some trash-talking.”