Basically you can borrow next year's points. So, depending on what use year you are currently in determines which points you can borrow.
For example, a Feb use year is currently in their 2002 year, so they can borrow their 2003 points now.
2001 = Feb 2001 thru Jan 2002
2002 = Feb 2002 thru Jan 2003
2003 = Feb 2003 thru Jan 2004
2004 = Feb 2004 thru Jan 2005
A November use year is still in their 2001 year, so they can borrow their 2002 points now.
2001 = Nov 2001 thru Oct 2002
2002 = Nov 2002 thru Oct 2003
2003 = Nov 2003 thru Oct 2004
Figure out your use year and month. Similar to the above. Then you can borrow from the next year only and those points would have to be used in the year they are borrowed into.
In the 1st example, currently in their 2002 use year, they could borrow their 2003 points to use sometime in 2002 (For them this is Feb 2002 thru Jan 2003) They cannot borrow their 2004 points for use in their 2002 use year.
In the 2nd example, currently in their 2001 use year, they could borrow their 2002 points to use sometime in their 2001 year (For them this is Nov 2001 thru Oct 2002). They cannot borrow their 2003 points into their 2001 use year.
Remember, Use year is NOT the same as calendar year. The simplest way is to think of your use year month as the January of your use year. So if JUNE were your use year, then for 2002 your year Jan-Dec is calendar June 2002 thru May 2003.
Hope this helps.