The latest attempt at this was written up by "Autumn" Sandeen in a post on Pam's House Blend. The National Center for Transgender Equality (NCTE) has issued proposed changes for the model law that most, but not all, states use for their laws regarding such matters:
The first and the last suggestions are actually not bad ideas. It is someone silly to require a court order instead of simply allowing the person to submit documentation to appropriate agency, and issuing a proper birth certificate is also a good idea. It is the second suggestion that is outrageous.
The simple fact is, birth certificates record the sex of the person, not the gender. They indicate whether the person is a male (i.e. having a penis) or a female (i.e. having a vagina). They have nothing to so with how a person likes to dress, or how they behave. To suggest that this should be changed without permanent, physical changes is simply absurd.
Sadly, this sort of insanity from the transgender movement is not unusual. And as is often the case, it is pursued without consideration for the harm it will bring to true transsexuals. It is highly unlikely that the changes will be accepted, but it will very possibly cause a backlash that will lead to efforts to increase restrictions on birth certificate changes. And it can add fuel to claims that SRS is not medically necessary.