Entries or rooms shall not be started off entries beyond the last open crosscuts, except that room necks and entries not to exceed 18 feet in depth may be turned off entries beyond the last open crosscuts if such room necks or entries are kept free of accumulations of flammable gas by use of line brattice or other adequate means.
4 Va. Admin. Code § 25-40-5440
Statutory Authority
§§ 45.1-161.3 and 45.1-161.294 of the Code of Virginia.