Iacp: collaborative law,collaborative practice, Locate collaborative professionals. find collaborative practice professionals in your area using our member directory: member directory >> are you a collaborative. Irish association counselling psychotherapy, New iacp headquarters. iacp is very pleased to confirm the purchase of a property to house the associations’ headquarters.. Iacp leim training conference - international, Please contact david j. roberts, senior program manager, iacp technology center, with any questions regarding the leim conference, 800-843-4227, ext. 858, or meghann.