Section 89 of chapter 71 of the General Laws, as appearing in section 7 of chapter 12 of the acts of 2010, is hereby amended by striking out the second sentence of the first paragraph of subsection (dd) and inserting in place thereof the following:-

The board shall develop procedures and guidelines for revocation, amendment, and renewal of a school's charter; provided, however, that an amendment or renewal of a charter for a Horace Mann charter school shall be subject to approval by majority vote of the school committee and local collective bargaining unit in the district where said charter school is located only to the extent that its initial charter required such approval; and provided, further, that a commonwealth charter shall not be renewed unless the board of trustees of the charter school has documented in a manner approved by the board that said commonwealth charter school has provided models for replication and best practices to the commissioner and to other public schools in the district where the charter school is located.