This liberal-from-the-outset approach is appreciated by most, though I have learnt that it doesn't suit every context or individual. Nonetheless, I was pleased to discover that the British Police have summarised the approach that I have always subconsciously taken, making it much more memorable: Engage - Explain - Encourage - Enforce.
Here's a graphic explaining how the approach works in the context of the current COVID-19 situation. Something similar might work well in staff handbooks and pupil planners: