Or. Rev. Stat. § 295.098
(1) A public official who enters into an agreement with a third party, under which the third party facilitates the receipt, collection, transfer, disbursement or payment of public funds and temporarily holds or deposits public funds, may use alternative methods to those set forth in this chapter to secure public funds that are held or deposited by the third party if the methods meet the following requirements:
(b) The alternative methods must be designed so that the public funds are fully secured while held or deposited by the third party and until the funds are remitted to the public body. A public official shall calculate the minimum amount of collateral required of a third party as follows:
(B) Within the first month of each calendar quarter subsequent to the initial calendar quarter of the agreement, the public official shall recalculate the minimum amount of collateral to equal a reasonable estimate of the highest amount of public funds that the third party is expected to hold or deposit unremitted at any time within the current calendar quarter based on factors that must include but are not limited to:
[2019 c.587 §30]