Sometimes officials are reluctant to commit themselves. Initially, an open mind on their part may be in your best interest. Don't hesitate to ask direct questions about their position on a subject. Committees are typically an advisory level of government. Recommendations are prepared in committees for people at higher levels.
Work leading up to decisions is conducted here.
Committees are typically specialized on a single issue or subject area. They are advisory. Going slowly and making small moves forward increases the chance that your views will be accepted by policy makers. Influencing a committee generally means giving a presentation to them. Have some of the senior staff in the relevant department review your proposal informally before presenting it.