(plaintiff’s motion for preliminary injunction against defendant’s “over 30-month” (OTM) rule which opened Canadian border to imports of live cattle born after March 1, 1999, and beef products from Canadian cattle of any age granted in part; case remanded to defendant to promptly provide notice and comment on OTM beef provisions and to revise any provisions of OTM rule deemed necessary; remainder of plaintiff’s case stayed during administrative proceeding required by remand).