Hi Cove
nice starting week
for your question bonnieblue
As the folks have said, each manager is responsible to handle the training for his subordinates if the changed procedure covering their tasks.
Also as stijloor said if the competancy is meet and if need, somme specific trainning is provided if the changes are bringing more risk during the work or what ever, in order to make the concern pepole habilitate to do it.
Usually, the changes before to be written into the procedure, are discussing between all the concern during the meeting, the safety walkdown, as way to inform and also to get the idea from all. and also it can be, if possible, added in the induction presentation.
But in my IMHO, the trainning is handled by the Human ressource responsible with the collaboration of the concerned manager. Because, this manager know if his people need additional official training or he can catch them during one meeting; and in case of need, the HR responsible is the one which can provide the appropriate person to cover the need of trainning.
Hope this help
Selena