No, if through circumstances beyond their control they cannot pray Lauds in the morning they don’t have to pray it at all. This goes for any priest in the Latin Rite, Tridentine or NO.
They can of course, if they have the opportunity, pray it at a different time of the day or they can foregoing praying it altogether.
In any case, the Liturgy of the Hours, more than an obligation is a privilege. Same with Mass. Since they look at this prayer as more than an obligation but rather as a source of joy and devotion, the sorrow they feel for NOT being able to pray it is enough prayer.
Hope that helps.