Statement
The Government has decided to run all commercial vehicles on bio-fuels in order to save the depleting fossil fuel reserves.
Assumptions
I. It is possible to switch over from fossil fuels to bio-fuels for vehicles.
II. Sufficient amount of bio-fuel can be produced in the country to run all commercial vehicles.

Assumption I is implicit. The reason is that if the Government has taken such a decision, it must have assumed that its implementation would be possible. Argument II is not implicit because on the basis of given statement it cannot be said with surety that sufficient amount of bio-fuel can be produced in the country. It is possible that the Government has import on its mind for the said purpose.