EU OPS 1.515, the one mentioning the 60% rule is not, in my opinion, restricted to planning stage. It is not like the planning minima. The operator has to ensure that pilots land within 60% of the runway. And so OMs usually include such rule, even in flight, while in normal ops.
The commander, not the operator, is obligued by the more generic rule, 1400, to ensure that a safe landing can be made.
So a pilot, if there is no overriding circumstances, has to abide by his OM, that should state the 60& rule except in abnormal operation.