Who's responsible for old window-fitted air con units

Hi there, I’m new to strata and have just purchased an investment property in NSW. The unit has two of those old style air conditioning units fitted to a loungeroom window and a bedroom window, obviously installed by the previous owner or the one before – window glass has been removed and it would be one of the most horrendous DIY jobs I’ve ever seen.

Have spoken to strata and have obtained approval to have the air conditioners removed and the windows repaired but wanted to ask my first newbie question – who pays?

Think I know the answer (sob) but wanted to put it to the group and would really appreciate any advice, similar stories etc re windows & airconditioners if you have had experience with them.