Del. Code Ann. tit. 16, § 4711
The Secretary shall administer this chapter. Except as otherwise provided in this chapter, the Secretary may delete or reschedule substances enumerated in the schedules of controlled substances only if:
16 Del. C. 1953, § 4711; 58 Del. Laws, c. 424, § 1; 60 Del. Laws, c. 583, § 2