The process might in fact be to block all domain-validated (DV) certificates and allow organization-validated (OV) and Extended Validation (EV) certificates. This would parallel the policy implemented by the Comodo Dragon browser, which displays a warning for DV certificates:
The security (or SSL) certificate for this website indicates that the organization operating it may not have undergone trusted third-party validation that it is a legitimate business. Although the information passed between you and this website will be encrypted, you have no assurance of who you are actually exchanging information with, and many websites connected to cyber-crimes use this type of security certificate. Prior to exchanging sensitive information including login/password, personal identity information, or financial details such as credit card numbers with any website that generates this warning, you should find some alternative method of validating this business or consider abandoning the transaction.