How do I unlock the mines? Are they tied to any technology? Thanks

Hi Ryika. Might seem like a very left of field request... however I was hoping that you might be able to build a custom mod for me for Sid Miers Beyond Earth: Rising Tide? Basically the idea is to add a "vassal" player to the game.
It would be a simple mod where:

1. An enemy you are at war with offers peace terms automatically when they only have their capital city left where they will offer to become an unending ally with you (they cannot declare war on you, but you can still declare war and wipe them out if you want) and offer to give you tribute of 25 energy, and 2 of each resource each turn. They cannot declare war on anyone.
2. If you liberate a city and bring a dead player back to life, they automatically are the same as mentioned above - an unending ally with all the same conditions.

I would like to discuss how I can provide a donation to help you to develop this mod.

Do submarines also benefit for increased Worker speed for the production of mines?

How do I unlock mines, what technology are they tied to?

nice