inaugural

an address delivered at an inaugural ceremony (especially by a United States president)

the ceremonial induction into a position; "the new president obviously enjoyed his inauguration"

occurring at or characteristic of a formal investiture or induction; "the President's inaugural address"; "an inaugural ball"

serving to set in motion; "the magazine's inaugural issue"; "the initiative phase in the negotiations"; "an initiatory step toward a treaty"; "his first (or maiden) speech in Congress"; "the liner's maiden voyage"