Stipend is 'sanctioned' by United States Code (law) Title 10 which states:
(d) Except when serving on active duty pursuant to subsection (c), a member of the program shall be entitled to a stipend at a monthly rate established by the Secretary of Defense, but not to exceed a total of $30,000 per year. The maximum annual amount of the stipend shall be increased annually by the Secretary of Defense effective on July 1 of each year by an amount (rounded to the next highest multiple of $1) equal to
(1) the amount of such stipend (as previously adjusted (if at all)), multiplied by
(2) the overall percentage of the adjustment (if such adjustment is an increase) in the rates of basic pay for members of the uniformed services made effective for the fiscal year in which the school year ends.
So, if the active duty force does not receive an increase in base pay, stipend will remain the same. However, there are a few other ways that HPSP may be affected. Specifically travel for ADT. As of 0740 12 March 2013, it is business as usual. However, this is the military and things may change.