Thanks for your help Steve, appreciated.
Have been looking at a Maruti ute, thinking maybe to upgrade to a 1.3, will be a bit to much work if it needs to be engineered.
Richard T

1.1 BASIC MODIFICATIONS NOT REQUIRING CERTIFICATION
The following are Basic Modifications that may be performed without certification providing the
modifications are carried out in compliance with the requirements detailed in Clause 2 General
Requirements:
 Fitting a replacement new, used or reconditioned engine;
 Fitting a manufacturer’s optional engine together with any associated components as
supplied by the manufacturer for that same model vehicle;
 Fitting replacement original equipment engine and exhaust components;
 Fitting replacement original equipment, equivalent or better, components that have no
influence on engine performance or emissions (e.g. higher volume oil pump than original);
and
 Fitting equivalent engines with an increase of up to 20% of original power.
In all of the above cases, if the engine is modified, it must be certified under the relevant Code
of Section LA.

An SJ413 is a different model to a MG410 or an SJ413 so a 1.3 isn't an optional engine, it's the engine from a different model.

Whilst I agree with what you're saying, how does one define the model? That's where it gets grey.

In any case, I'd never put a carby 1.3l in a Maruti. Just use a G16b and get it engineered. 10000x better result.

A MG410 is not a SJ413, just as a VB commodore isn't a VL, so an RB30T would require certification onto a VB.