Upon a showing that the grounds specified in G.S. 15A-273 exist, the judge may issue an order requiring the person named or described with reasonable certainty in the affidavit to appear at a designated time and place and to submit to designated nontestimonial identification procedures. Unless the nature of the evidence sought makes it likely that delay will adversely affect its probative value, or when it appears likely that the person named in the order may destroy, alter, or modify the evidence sought or may not appear, the order must be served at least 72 hours before the time designated for the nontestimonial identification procedure. (1973, c. 1286, s. 1; 1977, c. 832, s. 1.)