is it possible for a severable service to be extended past 12 months due to Government caused delays preventing the contractor from performing?
Assuming your contract is funded with annual appropriations (1 year funding), the answer is no, a severable service contract cannot be extended past 12 months due to Government caused delays. See GAO case B-317637, http://www.gao.gov/decisions/appro/317636.htm
. See also Chapter 5 of the GAO Principles of Federal Appropriation Law (GAO Redbook), http://www.gao.gov/assets/210/202437.pdf
See also FAR 32.703-2
and 41 USC 3902.