Successful bidder (or awarded bidder) shall provide at least two qualified service engineers for servicing in Thailand and also to assist the SRT on the operation and maintenance of these locomotives, at a period of not less than three years beginning from the date of arrival in Laemchabang Railway Station, Chonburi Province of the first lot of locomotives. The service engineers while staying in Thailand shall also represent the awarded bidder to fulfill all commitments on the guarantee under contract of the supplied locomotives. All expenses incurred for this provision of service engineers shall be borne by the awarded bidder