It is not mandatory. Customers may have certification requirements. The general product application process for HDMI is as follows:

1. Log in to the HDMI website and become a member (there are two ways, with different fees).

2. Enter the website as a member, download the test standards, understand what tests the product (finished products must be sent to HDMI designated laboratories) needs to be tested, and then test it yourself or entrust other laboratories to test it.

3. Send the test results to the U.S. headquarters for review. If the review is approved, the HDMI label can be affixed.

HDMI Licensing, LLC released HDMI Specification Version 1.4a on March 4, 2010 on behalf of the original HDMI development members. Features include key enhancements for 3D applications and the addition of a mandatory 3D format for broadcast content , and a 3D format called Top-and-Bottom.

Because the term "HDMI 1.4" is too broad and cannot show the specific supported technology of the device, the use of version number identification methods such as "HDMI version 1.4" is completely prohibited in this specification. According to the new version of the "Trademark and Logo Usage Specifications" released, HDMI cable manufacturers are prohibited from using version numbers when selling and promoting HDMI version 1.4 standard cables. Old version cables should remove all version numbers within one year. Labels, instructions, packaging, etc.