"If you're newly qualified then you're not likely to meet requirements for skills buttessment by TRA" is not universally correct.
Mark's 2nd and 3rd paras are in the zone, subject to clarifying some potential ambiguities...
1. The 5 and 4 years he refers to include the training period for the formal qualifications and formal apprenticeship periods respectively. It is not 5-4 years fulltime work experience after the formal vocational qualifications-formal apprenticeship.
2. The formal vocational qualification and the training leading to it must meet some requirements.
3. The formal apprenticeship period must be 4 years and must include appropriate formal off-job training.
4. The 6 year period also kicks in where formal vocational qualification-formal apprenticeship is not acceptable to TRA, with the formal training period-apprenticeship period counting towards the 6 years.
5. The additional year for electrical trades only applies in the "work experience alone" and point 4. scenarios.
6. By "competency-based certificate III" he means one achieved through a workplace buttessment process. Cert IIIs issued following fulltime training are also "competency-based".
But time is only one dimension of the TRA paradigm. The other dimensions are the nature-content of the training-experience, and proving your claims with appropriate documentary evidence presented in the correct way.
-- Glenn Newton