(a)  Generally . (i)  Types of Interests . Interests in the Partnership shall be divided into: (A) a General Partnership Interest, and (B) Limited Partnership Interests (including for the avoidance of doubt, the Regular Limited Partnership Interests (including the Exchangeable Limited Partnership Interests and the Special Voting Limited Partnership Interest), the Founding Partner Interests, the REU Interests and the Working Partner Interests (which shall not constitute separate classes or groups of partnership interests within the meaning of the Act; provided that Restricted Partnership Units shall be a separate class of Working Partner Interests and shall constitute a separate class or group of partnership interests within the meaning of Section 12(g) of the Securities Exchange Act of 1934, as amended). The General Partner may determine the total number of authorized Units and Non-Participating Units. Any Units or Non-Participating Units repurchased by or otherwise transferred to the Partnership or otherwise forfeited or cancelled shall be cancelled and thereafter deemed to be authorized but unissued, and may be subsequently issued as Units or Non-Participating Units for all purposes hereunder in accordance with this Agreement.