Understanding Society User Support

Hi

I would like to understand how benefit units are defined within UKHLS to ensure consistency with a variable I am constructing in a separate survey. The note on the benefit unit number variable (buno_dv) mentions that there is a do file available with more information, stating "See buno_dv_public.do for the do file"
https://www.understandingsociety.ac.uk/documentation/mainstage/dataset-documentation/variable/buno_dv

Can you point me to where I can find this do file? And is there any further advice or information available on how this derived variable is formed? Or more general advice on the construction of benefit units?

Many thanks

Ceri