How parenting works with this model

I have been trying to work through the May materials. I understand the advice to stop trying to control others. However, when it comes to parenting, how can I best handle when we have to jointly agree to how to handle our routines? A very simple example – my husband forgets to put sunscreen on the kids 99% of the time. This should not be negotiable but I can’t get him to do it and I can’t be with the family 100% of the time to do it myself.

Thanks in advance.