Main contractor and subcontractor agreements Project and construction works execution agreements Payment and statement organization Execution periods, delays, and penalties Additional works and change orders Guarantees, acceptance, and handover Breach of contract and termination cases Dispute and claim settlement * . . Keywords: construction projects, government contracting, government tenders. Subcontractor, construction contracts, operation and maintenance, heavy equipment rental, loader and backhoe rental, dump truck rental, building material supply, rebar and cement, ready-mix concrete, excavation and backfilling, asphalting and paving, electrical and plumbing contractor, construction labor, engineering office, contractor classification, company qualification for tenders, financing, statements