Windermere independent MLC Ivan Dean will next week move for legislation dealing with same-sex marriage and birth registration in the state to be investigated by a select committee.
A bill was introduced in the House of Assembly late last year to deal with same-sex marriage registration in the state but was heavily amended on the floor of Parliament to recognise transgender rights.
This included changes to the way information would be recorded on birth certificates into the future and how people could change their gender status.
Mr Dean believed although former Anti-Discrimination Commissioner Robin Banks had previously inquired on the changes, the community had not been largely consulted.
Mr Dean said if the committee won the approval of the Legislative Council, the terms of reference would cover the whole bill and not just the issue of birth certificates.
He said he believed there would be support for it but he would need to convince Labor and other members who largely supported the bill.
"In my view, it will be an absolute travesty if it doesn't go to an inquiry," Mr Dean said.
"The advice I've got from legal people, the state's Solicitor-General, the Office of Parliamentary Counsel, and the Registrar is that there are significant flaws in the legislation.
"Even with the new amendments which are being floated around, there are still legal implications for this bill and unintended consequences."
He said he had received concerns from police and medical professionals on the amended bill as it was.
"Parliamentarians do not have the right to proceed with a bill ... without getting the proper feedback," Mr Dean said.
Transforming Tasmania spokesperson Martine Delaney said upper house members had already been consulting on the bill widely with the community.
They said similar legislation had been passed over the past few months in the Northern Territory and recommended by the West Australia Law Reform Commission.
"The issues at stake have already been through a public inquiry by the Tasmanian Anti-Discrimination Commission, and this particular bill has gone through several layers of scrutiny, including from the Office of Parliamentary Council and the Children's Commissioner, they said.
"This is not a complex or radical reform and further consultation will only serve to delay the legislation and provide a platform for fear-mongering against vulnerable transgender and gender-diverse people."