The following is available in its entirety on the Canada Border Services Agency website
CN 15-028, Mandatory electronic notification of cargo at sufferance warehouses
1. This notice replaces Customs Notice 15-018. It provides new information regarding the timeframes for when penalties may apply for failure to transmit electronic warehouse arrival notifications.
2. The purpose of this notice is to inform sufferance warehouse owners/operators licensed by the Canada Border Services Agency (CBSA) that on May 6, 2015the requirement for the electronic notification of cargo arrival at sufferance warehouses under an amendment to the Customs Sufferance Warehouses Regulations became mandatory as previously communicated in Customs Notice 14-002.