use of picures bought in the past

Thanks

So what you are saying is: if I bought assets as "I", I should either transfer assets onto my gallery business and then they belowng to the gallery even if the owner changes, or  if I purchased them under my own named they are licensed to mypersonally (as an owner of the gallery), and if I cease to be a owner of the gallery I will need to transfer them with the appropriate written agreement?

Just consider all entities as separate, not related to each other, as if they would be third parties like a customer, supplier, competitor. It's not you, your company and your husband's company, it's A, B and C.

So A acquired the license with B's VAT number, meaning that A was "only" an agent doing busines for the account of B. All assets belong B, including the licences. B gets absorbed by C, including assets and liabilities. So now C is the rightfull owner of all licences and as legal successor of B, needs to conform to the licensing terms that A, as an agent for B, agreed upon. Easy?

1) As you are saying that the invoices were on your VAT number of your busines, that means from a legal point of view that not you personally as a private citizen have acquired the asset, as you would need in that case to pay the VAT, but you operating as a busines have acquired the licence. So it is truly the busines, wich includes the gallery that is the licencee. If you transfer the busines or part of the busines, all assets (and licences are assets) get transfered with, except if stated differently. So no need to do anything else, in the contrary: if you are using assets privatly, you would need to transfer the licence (and pay the VAT) for the transfer price (theoretically legally). 

2) You probably need to make the transfer contractually valid. Like selling the gallery for 1 $. Keep an eye on the taxes, to make the transfer "tax neutral". Taxes love such transfers, as they may suspect some tax scheme. 

I'm neither a tax expert nor am I a licensing expert, even that I took care for a while of my companies tradenames and I wrote the basic licencing contract that providers like photographs sign, when working for my company. While working for a bigger company, I have the advantage of having contracting and patent and trademark advisors in my back. But I did not recieve any legal training and I'm not giving legel advice. 😉

You have here a statement on licence transfers as seen by Adobe: https://community.adobe.com/t5/stock-discussions/transfer-license-to-a-client/td-p/11990240

I think that should clear any doubt that a transfer of licence is possible and what you need to do to make the transfer legally correct. As it is a busines transfer, I would consider this as parties A, B, C instead of you, your company and your husband's company.