How to Register with/without Admin approval in Joomla+CB Setting

Setting: Latest Joomla (3.9) + Latest CB (2.4.5)

Requirement: .
I want a visitor to be able to register as a Registered[-"common"] user automatically (without any intervention from Admins).
But a visitor should also be able to register as a Registered[-type"N"] user which would require admin authorization before access is given.
Where "N" is one of several Registered User Access Levels as previously defined.

I have not found where this situation is explained, so please point me in the right direction.
Issue1: How should the Joomla Login and the CB Login/Registration modules play together in this context (I have successfully used only the CB Login in a simpler setting.)
Issue2: How do I make the Registration Module give the visitor the right options and then perform the correct registration procedure (direct access/admin approval)

kind regards /Ake

Issue1: How should the Joomla Login and the CB Login/Registration modules play together in this context (I have successfully used only the CB Login in a simpler setting.)

You need to be using exclusively CBs login and registration. By default CB should redirect them away from Joomla to CB though.

Issue2: How do I make the Registration Module give the visitor the right options and then perform the correct registration procedure (direct access/admin approval)

So you want to toggle needing registration approval based off the value of a field? or you want a specific field to require approval before its value changes?

1. Thanks for clearing this up.
2. If a certain checkbox is ticked, admin approval is required, else not.

2. If a certain checkbox is ticked, admin approval is required, else not.

Best approach is to probably have a Code action acting on onBeforeUserRegistration change the approval behavior based off a field. This can be done with the below for example.

Global
Triggers: onBeforeUserRegistration
Type: Code
User: Automatic
Access: Everybody
Conditions
FIELD_NAME Equal To 1
Action
Method: PHP
Code:
This should turn on admin approval if FIELD_NAME has a value of 1, which for a checkbox field means it has been checked.