30 CFR §285.900

1. (a)Lessees are jointly and severally responsible for meeting decommissioning obligations for facilities on their leases, including all obstructions, as the obligations accrue and until each obligation is met.
2. (b)Grant holders are jointly and severally liable for meeting decommissioning obligations for facilities on their grant, including all obstructions, as the obligations accrue and until each obligation is met.
3. (c)If a lessee or grant holder has installed a facility on a lease or grant that was authorized by an authority other than BOEM and that approving authority has imposed a decommissioning obligation, such obligation will substitute for the requirements of this subpart. The decommissioning requirements in this subpart will apply to such a facility if the authorizing agency has not imposed or enforced a decommissioning obligation.