Certified Gas Provider The Board implemented new rules establishing the criteria for certification of competitive natural gas providers on April 25, 2001. Iowa Code ยง 476.87 requires that a competitive natural gas provider or aggregator must reasonably demonstrate managerial, technical, and financial capability sufficient to obtain and deliver the services it proposes to offer. The filing requirements established by the Board for such certificates are found in 199 IAC 2.2(18) and 199 IAC 19.14. The rules allow certified competitive natural gas providers to pool transportation service to Iowa small-volume business and residential customers for the first time. Competitive natural gas providers have served large industrial customers in Iowa for many years with requirements of large-volume transportation tariffs. Large-volume competitive natural gas providers are also required to become certified under the new rules.