Permissive

People gratuitously making fools out of themselves is a consequence of a pluralistic and permissive society.

Tom's parents were very permissive.

Tom's parents are very permissive.

Mary's parents are very permissive.

Mary's parents were very permissive.

My parents were very permissive.

Ziri's nanny was so permissive and allowed him to get away with stuff his father would never have allowed him to do.

"Permissive" working allows more than one train to be in a block section at one time but trains must be run at low speed in order to stop on sight behind the train in front. Such working is often authorised to allow freight trains to "bunch" together to await a path through a bottleneck instead of being strung out over several block sections, as would be necessary if absolute working were in force.