Regulatory environment The Group —because of the sector it operates in— is subject to strict environmental regulations, in terms of emissions, soil remediation, regulation of substances, etc. a) Industrial emissions Directive prevention and control), transposed into Spanish legislation through Law 5/2013, requires that the environmental permits be adapted at all centres to which it applies and requires that the best available techniques (“BAT”) be applied in production processes, within four years of publication of the conclusions from the reference documents on the best available techniques (“BREF”) applicable in each case.