Assessment Period Different than Fiscal Year

I do the books for an HOA in Idaho. Annual assessments are due August 15 for the assessment period beginning the following Sept 1 through Aug 31. The HOA's fiscal year is calendar year (1/1-12/31) and report cash basis on the tax return. Is it ok that the assessment period differs from the fiscal year?

Our HOA does the same thing and it is OK.

Yes, I think I've come to the same conclusion: fine, but a pain. Since the HOA is cash basis, it doesn't really matter. I just need to report cash in and cash out for taxes/books and bill for the different assessment year. Thanks for all of your feedback!