Chartered Organization Report Tenure Dates Used

Which dates are used to calculate tenure in the Chartered Organization Report? I’m trying to figure out our original charter year. Does tenure calculate to the Expiry Date, Date Report Generated, or some other date?

@LawrenceOverway - that is the term of active unit registration. I will get more information when i get home.

Our charter shows 70 years which is 840 and the charter report shows 849 which is 9 months over the 70 years.