18 . 
1 agency may reasonably determine to be necessary for the 
2 administration of any Act with respect to activities in- 
3 volving recombinant UNA.. 
4 SEPARABILITY 
5 Sec. 21. If any provision of this Act is held invalid by 
6 reason of being inconsistent with the Constitution, all provi- 
7 sions of this Act which are separable from that invalid pro- 
8 vision shall remain in effect. 
9 EFFECTIVE DATE AND EXPIRATION DATE OF ACT 
10 Sec. 22. (a) (1) This Act is effective upon enactment, 
11 except that sections 3(a), 10(a), and 18(4) (B) are ef- 
12 fective one hundred and eighty days after enactment. 
13 (2) Upon promulgation of standards under section 4, no 
14 person may possess or engage in the production of reconci- 
le binant UNA unless the production or possession complies 
1® with those standards. 
1^ (b) This Act shall expire five years after its enactment 
1® except with respect to records made within that period. 
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