Kickstart missing 'declare' for %pre?

I am attempting to write a few commands into the %pre section of a kickstart file to parse the arg list and assign some variables with which to write out configuration files based on user input.

The problem I have found is that using the following is missing (/tmp/ks-script-Xy187: Error: 'declare' command not found)

declare -A arglist

If I change TTY's I can get declare to work without any issue;

[anaconda root@localhost /]# declare -A test
[anaconda root@localhost /]# test[123]="abc"
[anaconda root@localhost /]# test[098]="xyz"
[anaconda root@localhost /]# for item in ${!test[@]}; do echo "${item} => ${test[${item}]}"; done
098 => xyz
123 => abc

Is this expected behavior when using %pre as follows?

%pre --interpreter=/bin/bash