On the 5th July 2017 The Standards for Registered Training Organisations were modified to update the specified qualifications required for trainers and assessors effective from 1 April 2019. This means you have just under 2 years to possibly upgrade your qualification (if you don’t meet the other criteria). I highly recommend you start planning this now, so you allow for the extra time requirements, and the additional portfolio of evidence you might need to produce.
Choices
There are choices for you AND you can keep your TAE40110 Certificate IV in Training and Assessment, and add one of the following:
(i) TAELLN411 Address adult language, literacy and numeracy skills or its successor or
(ii) TAELLN401A Address adult language, literacy and numeracy skills
as well as one of the following:
(iii) TAEASS502 Design and develop assessment tools or its successor or
(iv) TAEASS502A Design and develop assessment tools or
(v) TAEASS502B Design and develop assessment tools.
or you can upgrade to the TAE40116 Certificate IV in Training and Assessment.
Alternatively, if you are in a position to obtain a Diploma, you also can upgrade (and meet the requiremetns for 2019) to a diploma or higher level qualification in adult education. 
The link
The amendment and all the different solutions can be viewed via this link.