The low emission zone started operating on 4 February 2008 with phased introduction of an increasingly stricter regime until 3 January 2012.

Parallel and phased introduction might control this risk.

This began with a phased introduction of the students starting their St Andrews careers in 2007, with 55 progressing to the Scottish medical schools.

There will be a phased introduction of the scheme from 4 February 2008 through to January 2012.

The card was first issued to the public in July 2003 with a limited range of features and there continues to be a phased introduction of further functions.

Since then there has been a phased introduction around the world of reduced vertical separation minimum (RVSM).

Telefonica's overseas expansion has been spurred by the phased introduction of competition into the Spanish telecommunications market that began in 1994.

Training for young people is being revolutionised by the phased introduction of training vouchers across the country.

Zero 1 had 3 'phased' introductions.

A phased introduction into passenger service began in March 2011.