In that case, your orders are clearer than many are. A lot of orders are vague about what to do and who has 'jurisdiction' when circumstances deviate from the usual routine. I would say that "Well I've done it in the past, why can't I now?" isn't likely to be taken as a valid excuse, especially if you've raised your displeasure with what he's done at the time he's done it.
Why don't you just speak to him, email him, text him etc, and tell him you weren't happy about the decision that was made and that in the past you've let it slide and in this instance you will let it slide too but "In future, as per the orders, I expect to be advised immediately if [daughter] is sick and may need to stay home from school on Mondays, so that I can take steps necessary for the care of her to be handed over at 9am as per the order. If you don't respect the orders and the handover time in future and this continues to be an issue, I may file a breach of the orders in court" or something to that effect. That way you've made your opinion known and warned him that you intend to enforce it if necessary. Ultimately, open communication and compromise between parents is the key.
Why don't you just speak to him, email him, text him etc, and tell him you weren't happy about the decision that was made and that in the past you've let it slide and in this instance you will let it slide too but "In future, as per the orders, I expect to be advised immediately if [daughter] is sick and may need to stay home from school on Mondays, so that I can take steps necessary for the care of her to be handed over at 9am as per the order. If you don't respect the orders and the handover time in future and this continues to be an issue, I may file a breach of the orders in court" or something to that effect. That way you've made your opinion known and warned him that you intend to enforce it if necessary. Ultimately, open communication and compromise between parents is the key.