In the US, updating your transponder software (SW) to v2.02 REQUIRES that the physical transponder module be labeled to indicate the new TSO authorization.

Download the correct PDF for your transponder model below. Follow the instructions in the PDF to ensure that your SV-XPNDR-26X complies with TSO C166b:

SV-XPNDR-261 (Trig TT22):	for Software (SW)2.02.	Download Label (PDF)
SV-XPNDR-262 (Trig TT21):	for Software (SW)2.02.	Download Label (PDF)