Courts will generally decline to make declarations as to the scope of a valuer's exercise under a rent review clause at a preliminary stage before the valuer has completed the determination, particularly where the contractual mechanism has not been exhausted, the valuer has not sought assistance, and one party opposes intervention. The phrases 'reasonable and proper rental' and 'current market rental' are not synonymous and a court will not declare them to be so where the lease uses both terms.
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