(1) A person placing an order for construction works or a contractee for construction works (referring to a contractor who is awarded a contract for the relevant construction works for the first time from a person placing an order for construction works or a person who takes a leading role in supervising and managing the construction works; hereafter in this Section, the same shall apply) shall not reduce the construction period calculated based on the relevant drawings and specifications, etc.
(2) A person placing an order for construction works or a contractee for construction works shall neither use dangerous construction methods for reducing the construction cost nor change the construction methods without good cause.