This law provides for the environmental assessment of works and activities in order to grand an authorisation (permit) to build (Part A, articles 1 to 22). It also makes provisions for the regulation of illegally constructed buildings, with the aim to promoting a better environmental stability (Part B, articles 23 to 37). The works and activities of the public and private sector, which their construction or their operation may cause environmental impacts, are classified in two categories (A and B). The first category (A) includes the works and activities which may cause significant environmental impacts and for which an Environmental Impact Assessment Study is required so as to be established the special terms and restrictions for the protection of the environment with regard to that particular work or activity, according to the provisions of articles 2, 3 and 4 to the present law. The works and activities of category A are classified: a) in those causing severe environmental impacts (subcategory A1) and b) in those that cause important environmental impacts (subcategory A2). The second category (B) includes works and activities which are only characterized by environmental impacts at a local level and do not compromise significantly the environment. The works falling under this category are subject to general specifications, terms and restrictions, according to the procedures established in article 8 to this law. Article 10 provides for the environmental building authorisation within areas included in the Natura 2000 network. Article 20 aligns the Greek legislation with article 23 Environmental inspections of Council Directive 2010/75/EU on industrial emissions and integrated pollution prevention and control. The works and activities are classified into the various categories according to the criteria set forth in Annex I to the law. Annex II provides for the content of the Environmental Impact Assessment Study. The salient point of Chapter B of the law regarding the arrangement of issues concerning illegally constructed buildings, is that as from the entry into force of the present law, any transfer or legal right on a real estate property must be accompanied with a written statement, made by the owner and certified by an engineer, declaring that the building in question does not include illegally built parts or use.