Stop HOA restriction of white vinyl fences and allow 6 ft fences

Today I was informed by Talis Management personnel that the fencing guidelines have been recently changed and we were denied our architectual request that was started 3 months ago and confirmed received in full by HOA over 30 days ago. They said the changes were very recent. They seek to limit all fencing to the black wrought iron only on the grounds that it is more pleasing as a community if we have that uniformity of fencing.They have never published these changes online, in writing, or otherwise informed the community members to my knowledge. Their argument is flawed in that there is already many white vinyl fences in place and will not be forcibly removed; so there will never be the uniformity that they seek. We are starting a community wide petition to stop them from formally implementing the restriction of fencing solely to the black wrought iron. Also we are petitioning to change the height to include 6 ft fencing since it is more feasible for privacy and safety of pets and/or children. If you agree with this petition please sign so that we, as a community, can be heard and taken seriously.