Final answer:
The validation sticker of a commercial motor vehicle plate generally expires at the end of the month of validation. Vehicle owners must renew it before expiration to maintain compliance with registration laws.
Step-by-step explanation:
The validation sticker of a commercial motor vehicle plate typically expires at the end of the month of validation. Despite some regional variations, the general rule for commercial vehicle plates is that the displayed validation sticker indicates the last month during which the plate is valid. It is important to renew the validation sticker before it expires to remain compliant with vehicle registration laws and avoid penalties.