342. Adjustments where the price is fixed by the contract.

In the modern standard form contracts1, there may be adjustments to the contract price by reason of express terms of the contract. These terms are of three types: (1) clauses (known as 'fluctuation clauses') entitling the contractor to be reimbursed for any increase in the cost of taxes, labour or materials or giving the employer the benefit of any decrease in such costs2; (2) clauses requiring an adjustment to the contract price in the event of variations3; (3) clauses by virtue of which a contractor may claim other increases in the contract price4. In some cases the subject matter