Section 28.106-2 - Substitution of surety bonds(a) A new surety bond covering all or part of the obligations on a bond previously approved may be substituted for the original bond if approved by the head of the contracting activity, or as otherwise specified in agency regulation.(b) When a new surety bond is approved, the contracting officer shall notify the principal and surety of the original bond of the effective date of the new bond.48 FR 42286, Sept. 19, 1983, as amended at 61 FR 39213, July 26, 1996