CONTRACT: Building contract - Claim for work done - Claim for payment by sub-contractor against main contractor - Whether 'pay when paid' clause merely fixed time limit for payment - Whether `pay when paid' clause absolved main contractor's liability to pay sub-contractor

CONTRACT: Termination - Construction of clause - Claim for payment by sub-contractor against main contractor - 'Pay when paid' clause in sub-contract - Whether `pay when paid' clause merely fixed time limit for payment - Whether main contractor's liability under sub-contract conditional upon receipt of payment from employer

CONTRACT: Terms - Construction - Claim for payment by sub-contractor against main contractor - 'Pay-when-paid' clause - Whether `pay when paid' clause merely fixed time limit for payment - Whether 'pay when paid' clause absolved main contractor's liability to pay sub-contractor