Found an interesting article that references the Canadian monetary system pg. (62) and lawful money as Dominion notes or gold on pg. (65). Could this be used as a reference to the difference between lawful money (dominion notes or gold) as opposed to private credit (bank notes) when articulating the redemption verbiage. Specifically if you reference back to pg. (63) second paragraph.
https://www.jstor.org/stable/pdf/1011847.pdf