My view is that if the 'boundaries of the site' were defined by reference to a drawing, then regardless of whether that drawing was subsequently changed by the PM as an instruction changing the Works Information, then the ORIGINAL drawing would still stand as defining the boundaries. As the PM has no power to change Site Information, this situation contractually could not occur.
For sectional Completion Dates and access dates, I see no reason why you would reference another document, but the same principle would apply if the contract compiler had done so.
For sectional Completion Dates and access dates, I see no reason why you would reference another document, but the same principle would apply if the contract compiler had done so.