Consider the following statements regarding the Graded Response Action Plan (GRAP) and the Commission for Air Quality Management (CAQM) in the Delhi-NCR region:

Statements

1. GRAP is incremental in nature, meaning that when a higher stage is activated, the measures of all preceding stages continue to remain in force alongside the new stage's measures.
2. The Commission for Air Quality Management (CAQM) was established through a statutory Act, replacing the Environment Pollution (Prevention and Control) Authority (EPCA) as the body responsible for implementing GRAP.
3. Stage I of GRAP is activated when the Air Quality Index falls in the 'Severe' category, while Stage III corresponds to the 'Poor' category.