API 5L PSL 2 for CO2 Rich Gas?

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Hi experts
I read that API 5L PL2 is for sour services, is there any restriction on not to use API 5L PSL 1 for CO2 rich gas? I suggested API 5L PSL 2 for CO2 rich gas but my client asking for any reference from code in favor of using API 5L PSL 2 for CO2 rich gas.
Thanks

 

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@blacksmith37, thank you for this information, it will really help, noted.

 

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@sjones, thanks, I am waiting for reply from my client then content of fluid will be clear.