(a) Flexible permit. A person may obtain a flexible permit which allows for physical or operational changes as provided by this subchapter as an alternative to obtaining a new source review permit under §116.110 of this title (relating to Applicability), or in lieu of amending an existing permit under §116.116 of this title (relating to Changes to Facilities). A person may obtain a flexible permit under §116.711 of this title (relating to Flexible Permit Application) for a facility, group of facilities, or account before any actual work is begun, except as provided in §116.118 of this title (relating to Construction While Permit Amendment Application Pending), provided however:(1) only one flexible permit may be issued for an account;(2) modifications to existing facilities included in a flexible permit may be authorized by the amendment of an existing flexible permit;(3) a new facility may be authorized by the amendment of an existing flexible permit; and(4) a flexible permit may not cover facilities at more than one account.(b) Change in ownership. The new owner of a facility, group of facilities, or account shall comply with §116.110(e) of this title, provided however, that all facilities authorized by a flexible permit must change ownership at the same time and to the same person, or both the new owner and existing permit holder must obtain a permit alteration allocating the emission caps or individual emission limitation prior to the transfer of the permit by the commission. After the sale of a facility, or facilities, but prior to the transfer of a permit requiring a permit alteration, the original permit holder remains responsible for ensuring compliance with the existing flexible permit and all rules and regulations of the commission.(c) Submittal under seal of Texas licensed professional engineer. All applications for a flexible permit or flexible permit amendment shall comply with §116.110(f) of this title.(d) Responsibility for flexible permit application. The owner of the facility, group of facilities, or account or the operator of the facility, group of facilities, or account who is authorized to act for the owner is responsible for complying with this section, except as provided by subsection (b) of this section.