Surely withholding keys from the OC when one is absent and in fact not passing the keys to a neighbour or friend is the very definition of hindering? No?
No. If it was, there would be a standard by-law to that effect. The section you quote is to deal with people who don’t want anyone coming into their apartments for reasons that range from privacy to criminal activity and in so doing interfere with essential or emergency repairs. The front door is common property so the OC has a lot of leeway in that regard.