Renewal of fixed-due-date loan

Question

Is it possible to set up fixed-due-date loans (tab16, column 5, value of "A") to renew for, for instance, an additional 4 weeks?  (See example in Additional Information below.)

Answer

This can *not* be done automatically.  The Circ operator will need to override the due date on the renew with the 4-week period.  Of course this could not be done on the Web; the patron would need to bring the item to the Circ Desk.

Additional Information

Example:

MDiv/MACE students (patron status 39) now have end of term due dates. Column 5 is set to A and we change the actual date in column 6 four times a year for 3 patron status/item combinations. The first end of term due date is Dec. 18, 2015 and any book (item status 1) checked out between Aug. 1 and Dec. 4 was given a due date of Dec. 18. We wanted to allow one renewal on those end of term dates of four weeks. So any renewal with patron status 39 and item status 01 in tab 16 would be four weeks from the due date of Dec. 18, 2015, then four weeks from April 15, 2015, etc. 

We set up tab 16 for the specific item/patron combinations to say that one renewal was allowed, but we don’t know how to set up the actual maximum renewal period when someone can check out a book at any point two weeks before the start of a new term and the day it ends. Because students are checking books out at various times during the term, I can’t figure out how to set a MAXIMUM renewal period that doesn’t go beyond 30 days past the first due date. 

For example, the first Dec. 15 due date was set on July 24. Any person checking out books that day got a Dec. 18 due date. A person checking out a book a person who checked a book out on the first date that loans were calculated with a Dec. 18, 2015 due date would have had the book for 147 days. In order to give them a four week renewal period, I could make column 22 (maximum renewal period) as 177 days. But if I set it for 177 days, the person who checked it out two months into the term has a renewal into mid-March, not mid-January. If I make it less than 177 days, the person who checked the book out at the beginning of the term doesn't get it for a full four weeks.