For a coal lease issued under chapter 85, 41 Stat. 437, 30 U.S.C. 181 to 184, 185 to 188, 189 to 191, 192, 193, 195, 201, 202 to 203, 205 to 208-2, 209, 211 to 214, 223, 224 to 226, 226-2 to 226-3, 228 to 229a, 241, 251, and 261 to 263, commonly known as the mineral lands leasing act of 1920, the department shall not grant extensions of time that extend beyond the period allowed for diligent development under section 7 of chapter 85, 41 Stat. 439, commonly known as the mineral lands leasing act of 1920, 30 U.S.C. 207.
MCL 324.63515