Your package is the certified light-gauge steel building system plus a coordinated licensed builder. Here's what's in it.
Light-gauge steel wall panels, engineered with connection details designed for on-site assembly.
Flat-pack floor and roof cassettes sized to ship in a 40 ft container and connect to the wall system.
The engineered connection details and assembly documentation the builder works to. [Certification ref in your quote.]
A registered builder assembles, connects and certifies on site under their licence and building contract. [Builder & licence named in your quote.]
Because these are the things you rely on, they're set out formally in your project documents rather than as website claims: the structural certification reference for the system, the assigned builder's name and licence number, the building approvals pathway for your site, and the home warranty / domestic building insurance that applies. Ask us and we'll walk you through each before you commit.