If you are importing or manufacturing the product which are defined in Mandatory BIS Registration List but your product meets at least one of the following criteria –
a. Equipment Powered by Three phase power supply, OR
b. Equipment Powered by Single phase power supply with current rating exceeding 16 Ampere, OR
c. Equipment with dimensions exceeding 1.5 m x 0.8 m, OR
d. Equipment with weight exceeding 80 Kg.
And you are importing / manufacturing less than 100 unit per year.
Then BIS Registration will not be applicable on your product. For example, if you are importing 65” LED TV which dimension is exceeding 1.5m x 0.8m and quantity is less than 100 units per year then BIS Registration will not be applicable on this product. You need to only submit the "Self Declaration" letter for the same to get the clearance from custom department.