Where parts of the system are subcontracted or purchased by the CONTRACTOR, it shall be considered as part of CONTRACTOR's system and it is the CONTRACTOR's responsibility to ensure that the complete system complies with all the relevant specifications. CONTRACTOR shall assume single point responsibility for all aspects of the work. This shall include timely request and release of information/drawings, timely completion, liaison with the COMPANY/OWNER/PURCHASER, and liaison with its Sub-CONTRACTORs, co-ordination of the work, performance guarantee and provision of warranty for the complete system.