Anne and Ken Greenwood last week wrote a letter to Planning Minister Justin Madden seeking information but are yet to receive a response.

Mr Madden's spokeswoman, Sophia Dedes, told Hume Weekly that the Greenwoods would have to wait like everyone else.

"The minister has said previously that the final boundaries for the UGB and GAIC [Growth Areas Infrastructure Contribution] legislation go before Parliament. The decision on whether the infrastructure contribution and the UGB go through rests with Parliament.

"The Government will consider all submissions before any final decisions are made about Melbourne's new boundaries. The Government has said repeatedly that if the GAIC does not go through Parliament then the UGB will not be moved."

As reported by the Weekly on July 14, the Greenwoods' 65.5-hectare Gunns Gully Road property has been earmarked to be included in the 2009 UGB. The Greenwoods use the property as their home and to run an equine business. If the property is included in the UGB, they will have to pay a GAIC on the land at a rate of $95,000 per hectare if they sell.

"Our property is our only superannuation investment and we may need to sell it in the near future," they said.

"If we are included in [the] proposed planning scheme, we believe that we will lose our life savings by being forced to sell to a developer and having to pay the Growth Areas Infrastructure Contribution. We believe that we will have a better chance of receiving fair value for our property if we are able to sell it unencumbered on the open market."

Conservation and community groups have called on the Federal Government to reject the UGB proposal until the community has seen the revised plans and had time to conduct more research.

Friends of Merri Creek vice-president Ann McGregor said it was hard to know if the State Government had changed its proposal following a four-week public consultation period (between June 17 and July 17) as the revised plans were not made public.

"Failure to get this process right will destroy some of the last remaining examples of habitats. Up to 25 animals and 32 plants listed as nationally significant could be impacted."