Section 352.3 - Registration and issue(a)Registration. Series HH bonds may be registered as set forth in subpart B of 31 CFR part 353 , also published as Department of the Treasury Circular, Fiscal Service Series No. 3-80.(b)Validity of issue. A bond is validly issued when it is registered as provided 31 CFR part 353 , also published as Department of the Treasury Circular, Fiscal Service Series No. 3-80, and bears an issue date and appropriate validation indicia.(c)Taxpayer identifying number. The registration of a bond must include the taxpayer identifying number of the owner or first-named co-owner. The taxpayer identifying number of the second-named coowner or beneficiary is not required but its inclusion is desirable.54 FR 40249, Sept. 29, 1989, as amended at 57 FR 14286, Apr. 17, 1992; 71 FR 46857, Aug. 15, 2006