406.4(D)(2) Non-Grounding-Type Receptacles.

When replacing a non-grounding type receptacle with a GFCI type, the receptacle or the cover plate must be marked “No equipment ground”.

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2020 NEC 406.4 General Requirements

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Replacing Two-Wire Receptacles

Chapter 2 Wiring and Protection: Wiring and Protection, Texas Electrical Code 2020

Last update! Good now?? : r/askanelectrician

Tamper-Resistant Receptacles - InterNACHI®

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10-3 NONGROUNDING RECEPTACLES - 406.4(D)(2), (D)(3), AND Ex.

Chapter 4: Equipment for General Use, Colorado Electrical Code 2020