Oregon Revised Statutes Mortgages and Liens § 86.240

(a) To deposit in any escrow account which may be established in connection with the agreement, prior to or upon the date of settlement, a sum in excess of the estimated total amount of property taxes, insurance premiums, and similar charges which actually will be due and payable on the date of settlement, and the pro rata portion thereof which has accrued, plus one-sixth of the estimated total amount of the charges which will become due and payable during the 12-month period beginning on the date of settlement; or

(b) To deposit in any escrow account, which may be established in connection with the agreement, in any month beginning after the date of settlement a sum in excess of one-sixth of the total amount of estimated property taxes, insurance premiums or similar charges which will become due and payable during the 12-month period beginning on the first day of the month, except that in the event the lender determines there will be a deficiency on the due date, the lender shall not be prohibited from requiring additional monthly deposits in the escrow account of pro rata portions of the deficiency corresponding to the number of months from the date of the lender's determination of the deficiency to the date upon which the charges become due and payable.