A permitted tax year for a partnership may be determined under any of the following, EXCEPT:

a$)$ A business purpose

b$)$ The same tax year as a majority of its partners

c$)$ Any year, so long as the partnership makes a required payment and the deferral period is not more than three months

d$)$ A calendar year

e$)$ The same tax year as the principal partners $($if the majority of its partners do not have the same tax year$).$