I disagree. Knowing the details of an apprenticeship program upfront are critical to attract and retain both the "apprentices" and the "masters" necessary to make a program work. It would be unfair to both groups to have divergent programs and skill levels being passed off as apprenticeships.
There are plenty of successful models that a program could be based on. In the US, electricians require 5 years of work with a journeyman + classroom instruction. Professional Engineers require a degree in their discipline, 2 examinations, and 4 years of relevant experience, usually under a licensed engineer before they can get their PE license (its not called an apprenticeship, but an EIT - Engineer-in-Training. You are expected to learn from a more experienced engineer who is responsible for overseeing your work and providing a recommendation before you are licensed).
There are plenty of successful models that a program could be based on. In the US, electricians require 5 years of work with a journeyman + classroom instruction. Professional Engineers require a degree in their discipline, 2 examinations, and 4 years of relevant experience, usually under a licensed engineer before they can get their PE license (its not called an apprenticeship, but an EIT - Engineer-in-Training. You are expected to learn from a more experienced engineer who is responsible for overseeing your work and providing a recommendation before you are licensed).