Should New Rules Apply to Old People?

When ever a person applies for a job, there is a list of duties and responsibilities that come along with the job. Applicants generally decide whether or not they can complete those tasks before taking the job, but what happens when requirements for a job change while you're already in the position?

For many court employees across the nation, that is exactly what happened with the Supreme Court of the United States' decision to allow same-sex marriage.  Some people in key positions found themselves in a place of being forced to comply with a law that goes against their moral convictions.  So, what do they do?  Should they leave their jobs in search of those that will allow them to respect their religious practices? What if they've worked in said position for a number of years and don't want to lose pensions?
Should they be grandfathered in and allowed to keep their positions while refusing to perform certain duties, leaving them for others to complete, or should they be forced to comply with the new guidelines?

Kentucky clerk Kim Davis was jailed for refusing to issue same-sex marriage licenses; and even here in Alabama, Washington County Probate Judge Nick Williams has asked the Alabama Supreme Court for an order protecting him and other officials who refuse to issue marriage licenses to same-sex couples. Is jail is a suitable "punishment" for a person who is simply upholding his/her moral convictions? Your thoughts?