Ann: HL Pharma Submits Australian Import Licence Appllication, page-98

Oils and tinctures are also associated with alternative medicine which big pharma have spent almost a century trying to discredit.
As far as dosages go, a ml dropper of a certain cannabis extract, wether it's an oil or whatever can be very accurately measured for cannabinoid content during the manufacturing process. A basic way to do it is to take the lab tested cannabinoid percentages from the base product and go from there. Can be done in a home kitchen very accurately so a lab would have no problem working it out. Just a matter of time before the science and results from MC works it's way through medical fraternity and general public.
Topically applied oils and tinctures will probably not have much use (except for inflammation lotions). Below the tongue and even up the out hole will become popular administration methods.