I can only explain my own guess/ logic about the ownership of the club now and in the coming years. No detail has been published but logic says that KM gave away 50% of the club at a mutually agreed value ( £20m?, bear in mind no freehold anywhere) after writing off any debt owed to him or his companies.
In return the prince legally committed to invest an agreed amount of cash within an agreed length of time. Once that amount has been invested then the prince becomes the unfetttered 50% owner. The amount of investment by the prince would have to cover 50% of annual losses also.
What happens when the owners are equal 50/50 shareholders can only be guessed.
My guess is that only the prince will continue to invest capital cash in return for a quid-pro-quo assignment of shares each year, thereby increasing the prince's holdings on a sliding scale with KMs' reducing until one has 100% and the other zero.. The share of annual losses/profits will be in proportion with an annually changing proportion of shareholdings.
It may be that KM sees himself continuing as 50% owner as the only possible way to recover some of the £50m plus he has thrown away on the club over the years, but if he does then he will obviously have to invest in equal measures with the prince and somehow I doubt he will at his age unless his sons are up for it, being his heirs.