Definitions of these activities can be found in the Food and Drug Regulations - Amendment (Schedule No. 624) Establishment Licensing Framework or the Guidance Document on Establishment Licences, both of which are located on the Health Products and Food Branch Inspectorate website:
http://www.hc-sc.gc.ca/hpfb-dgpsa/inspectorate/
Pharmacies selling or otherwise distributing pharmaceuticals to other pharmacies (even in small amounts) require an Establishment License.
The following businesses hold an Establishment License for drugs:
http://www.hc-sc.gc.ca/hpfb-dgpsa/inspectorate/del_tc_e.html