On bill:
A bill is:
a statute
in draft before it becomes law; "they held a public hearing on the bill";
or
a
proposed law;
or
a
draft of a law
or
a
legislative proposal introduced by a Member of Congress. Bills are designated as HR (House of Representatives) or S. (Senate) according to the body in which they are introduced, and assigned numbers according to the order in which they are introduced.
or
a
proposed law, introduced during a session for consideration by the Legislature, and identified numerically in order of presentation; also, a reference that may include joint and concurrent resolutions and constitutional amendments.
etc.
So, the emphasis lies on the fact it has not been approved
yet.
http://www.google.co.uk/search?sourceid=navclient&ie=UTF-8&rls=GEUA,GEUA:2005-51,GEUA:en&q=define%3AbillThefore, the term you should use is
νομοσχέδιο:
to amend a bill: τροποποιώ νομοσχέδιο
to draft a bill: καταρτίζω νομοσχέδιο
to introduce a bill: εισάγω νομοσχέδιο
Source:
Λεξικό Νομικών Όρων Καρατζά-Ζόμπολα