The name of every professional entity shall end with one or more of the words or abbreviations permitted in the applicable associated acts; provided, that such words or abbreviations shall be modified by the word “professional” or some abbreviation of the combination, with or without punctuation, including, without limitation: “P.C.”, “P.L.P.” or “P.L.L.C.”. Provided further, each of the regulating boards may by rule adopt further requirements as to the names of professional entities organized to render professional services within the jurisdiction of such regulating board.