Aren't hiring decisions usually handled by the department? This seems like it would be hard to implement because the pool of people who are going to make hiring decisions over a span of several years would basically be every professor in the school. I mean the admin could send an email saying "don't penalize OA pubs over Elsevier pubs" but (1) that's a hard rule to follow even if you're trying in earnest, (2) you have to expect a great chunk of hiring committee members aren't going to follow this directive, and it'd be impossible to tell whether they did.
