"Penthouses." . . "Washington (D.C.)" . . "Apartment houses Law and legislation Washington (D.C.)" . . "Apartment houses Law and legislation." . . "Buildings Height restrictions Washington (D.C.)" . . "Buildings Height restrictions." . . . . "Penthouses Washington (D.C.)" . . "United States," . . . "An Act to Amend the Act Entitled \"An Act to Regulate the Height of Buildings in the District of Columbia\" to Clarify the Rules of the District of Columbia Regarding Human Occupancy of Penthouses above the Top Story of the Building upon Which the Penthouse is Placed"@en . . . . . . . . . . . . "Statutes and codes"@en .