Liquefied petroleum gas containing more than five percent liquid volume butane or butylenes shall be designated as butane-propane mixtures and shall be sold for use only in those applications approved by the director of the division of oil and public safety and for which special use permits have been granted.
C.R.S. § 8-20-414
Restrictions on use of butane and butane-propane mixtures
Known as the Colorado Antifreeze Law
The act spans §§ 8–8 (81 sections).
Digitized from: Public.Law — Colorado Revised Statutes. Reproduced from public-domain Colorado statutes; confirm against the official source for the current text. Not legal advice.