Mazy,
Anyone who is an Attorney or a CPA will likely not tell you on this site.
I am neither of those. However, I did look up the IRS code that the article Ellen provided referenced.
According to
this article from taxnotes, (which is the same wording but laid out better then
§ 1.528–9 (scroll to next page to see section (d)) from the IRS website) Per section Sec. 1.528-9 Exempt function income of that code:
(d) Special rule. Notwithstanding paragraphs (a) and (c)(3) of this section, amounts received from members or tenants of residential units owned by members (notwithstanding section 1.528-1(d)) for special use of an association's facilities will be considered exempt function income if:
(1) The amounts paid by the members are not paid more than once in any 12 month period; and
(2) The privilege obtained from the payment of such amounts lasts for the entire 12 month period or portion thereof in which the facility is commonly in use.
Thus, amounts received as the result of payments by members of a yearly fee for use of tennis courts or a swimming pool shall be considered exempt function income. However, amounts received for the use of a building for an evening, weekend, week, etc., shall not be considered exempt function income.
Therefore, I would ask your CPA if he is aware of this special rule and if it applies to your Association and why or why not.
To me, and again I am not a CPA or an attorney, that section of the code is clear -
If the rental of spaces are offered to the entire membership each year and those who choose rent said space for the year for a specific annual amount (not a monthly amount i.e. a yearly contract - which could be paid monthly), those funds would be exempt.
Links have been provided. Read it for yourself and, if you are still not sure, share it with paid professionals for their paid opinion (but show them that specific section).