This procedure describes how entities with legal personality can apply for authorization, more precisely authorization requirements for testing laboratories operating in the Construction and Construction Materials field. The authorization attests the legal competence to issue, under the law, documents stating the fulfilment of construction standards and quality standards of construction materials The analysis and testing laboratories in construction perform tests for quality control, during the execution of construction works or/existing construction elements, necessary for technical expertise of buildings and tracking their behavior over time, and will be referred to as laboratory procedure