What is meant by ‘snowballing’? Will rotational delays be addressed in another way?

Snowballing is a term associated to pushing on the consequences of a flight delay to flights operated later in time.

The relevant timeframes (including how rotations play a role) are described in article 4 under 3 of the Policy Rule. If one of the situations referred to in the first paragraph has occurred on an earlier flight, as part of a rotation, the justification may apply to a later flight of the rotation.