(b) For the purposes of this section, the term extraordinary expenses means those expenses which, in the opinion of the displacing Agency, are not routine or predictable expenses relating to the utility's occupancy of rights-of-way, and are not ordinarily budgeted as operating expenses, unless the owner of the utility facility has explicitly and knowingly agreed to bear such expenses as a condition for use of the property, or has voluntarily agreed to be responsible for such expenses.