Arvind Kejriwal among others. The graded action plan has four levels of alerts based on the positivity rate or number of new cases, oxygen or bed occupancy.
The first level (L-1) is yellow coded, second (L-2) is 'Amber', third level (L-3) is 'Orange' and the highest level (L-4) is 'Red' that denotes over five per cent positivity or number of new cases reaching 16,000 during a week or 3,000 oxygen-bed occupancy.
The plan states that there are three types of situations in which restrictions will be put in place in respect of domestic travel.
The restrictions will come into force when a 'Red Alert' (Level 4) has been enforced in Delhi and people are coming by air into the city (including transit passengers) from other highly infected