...as long as football and the NCAA basketball tournament are the main sources of revenue for the NCAA, the NCAA, its member institutions, and its broadcast/internet partners will continue to protect their intellectual properties, which includes all championships that fall under the NCAA umbrella.
The NCAA is within their right to put those rules/guidelines on media credentials to protect those entities who have made a major financial investment. Remember that financial investment CBS & ESPN made gives the NCAA the money to stage these national championships, which includes athlete travel, lodging, meal money, etc.
If the member institutions want to break away from the NCAA and form a new organization for track & field, they certainly can (much like what they did when they formed the BCS in football, keeping in mind the major conferences also had the major bowl games to back them).
However, the bigger question is, is it financially feasible for the universities? Can you sell the collegiate track & field championships solo to corporate America, and give them the same value in terms of exposure as if they were part of a larger package, like the NCAA basketball tournament? Can universities travel more or less athletes to a national championship if they break away from the NCAA? More importantly, will it cost the universities more/less money in that scenario?
My guess is probably not--I don't think the corporate sponsors/networks/media/internet properties will want to bankroll a national collegiate track & field championship.
Track is just a small part of the big collegiate sports properties package.