How must similar work be defined in a construction tender?

Similar work is determined by reference to the relevant similar work groups, in a way connected with the nature and size of the construction work covered by the tender. Very narrow definitions, or definitions unrelated to the work, may restrict competition. (See Public Procurement Law No 4734, Articles 10 and 62(h); Construction Works Tenders Implementation Regulation, Articles 39 and 44 to 49.)