essential condition
sine qua non

On the contrary its development is an essential condition for the growth of our heavy industry.

The essential condition is clearly to guarantee a high level of employment.

Clearly, however, respect for human rights is an essential condition of these agreements.

That is the essential condition for establishing a European area of justice.

They are also essential conditions for such a relationship.

That is an essential condition if we are to bring all countries on board.

This is also an essential condition for all democracy and market economy.

That is what I wanted to say to you very quickly on growth, an essential condition for the creation of jobs.

For the success of the operation, it is an essential condition.

An essential condition for establishing an area of freedom, security and justice is that our work should have strong popular support.