Thank you Larry.
Larry has always been a most generous forum member, giving delinquent trolls more than we deserve. Therefore, in the spirit of such generosity let us cite some authority having jurisdiction.
Corrugated Stainless Steel Tube
(CSST) mandates #6cu bonding vs
Flexible Appliance Connectors (FAC)
The above IFGC, IRC, CSA/ANSI LC-1 reference are likely adopted by most state codes. My state currently adopts the #6 bond for CSST thru the plumbing code, and gas code 2021 NFPA-54 7.12.2.2
All CSST requires #6cu bond, regardless of NFPA-70.
"
Other than CSST" may use appliance EGC, per Electrical NFPA-70 & Gas NFPA-54 7.12.1
7.12.1 Pipe and Tubing Other than CSST.
Each above ground portion of a gas piping system, other than CSST, that is likely to become energized shall be electrically continuous and bonded to an effective ground-fault current path. Gas piping, other than CSST, shall be considered to be bonded when it is connected to appliances that are connected to the appliance grounding conductor of the circuit supplying that appliance.