It is correct and usable in written English.
It is an adjective phrase that can be used to describe how one feels about a proposal. Example: The team was supportive of the proposal, expressing their enthusiasm for the project's potential.
If, for example, the message board was intended to gauge support for the implementation of VeriSign's proposed Wait-Listing System, comments were tabulated as supportive of the proposal, in opposition to the proposal, or off-topic.
The administration has previously indicated they are supportive of the proposal, and might submit legislation themselves.
This should not be misinterpreted as not being or being supportive of the proposal".
"I've discussed this proposal with Adam Giles, who tells me he's been approached by a number of elders who, like himself, are keenly supportive of the proposal".
Other Congressional leaders of both parties said they still wanted to scrutinize that section of the bill closely but were generally supportive of the proposal and said they would work together to see it passed.
Others were supportive of the proposal, including Michael Toner, a Republican commissioner, who said in a statement that the document was "very sound" and would allow the commission to address the legal status of 527 groups.
While its engineers and traffic officials were supportive of the proposals, they felt unable to actively endorse them "for fear of professional liability".
"If those outstanding points can be addressed then we are supportive of the proposals".
Even cities where HS2 is going nowhere near, like Hull and Newcastle, are supportive of the proposals.
were largely supportive of the proposals.
Dominic Grieve, chair of the intelligence and security committee, is quoted in the Oxford Research Group report as being supportive of the scrutiny proposal, as is the defence committee chair, Julian Lewis, with some caveats.
