The Fiqh Council is encouraging all Muslims throughout North America to consider using the new methodology for the sake of unity and to avoid the confusion and disputes that have occurred in the past. However, the Fiqh Council does not intend to force its decision on anyone or any Muslim community.
You should follow the decision of your Imam and your Masjid. Moreover, you should do so with great respect and avoiding unnecessary disputes and discussion. It is not expected that everyone will embrace this decision immediately. As with all changes, it will take time for people to understand the new method. But, Insha’Allah, once people see the new methodology as a more objective and accurate standard, it will serve to unite us in the near future.