In these options, the main one that jumps out as a benefit to the Liege would be Succession Rights. Comes with +5 opinion towards their Liege.

Title Revocation - Protects the Vassal from Titles being revoked.

Gives a +5 opinion towards their Liege, but the Liege suffers -2 opinion from all Powerful Vassals.

Council Rights - Vassal can demand a seat on the Council whenever they want.

Liege gains a +5 opinion from the Vassal.

War Declaration - Vassal can declare war regardless of Crown Authority and pays 50% less for Casus Bellis within the Realm.

This comes with a -5 opinion to their Liege.

Succession Rights - Vassal is forced to use the Partition Succession Law and Law changes cost 25% more Prestige.

Liege suffers -2%/month Growth across Domain.

Coinage Rights - Vassal gains +0.3/month Development Growth in their Capital.

As their Liege you suffer +5% Castle Buildings construction cost.

Fortification Rights - Vassals pay 10% less Tax than their obligation demands, gain +1 Fort Level, -15% to Castle Buildings construction cost, and -50% to Castle Holding construction cost.

There are six of these in total, each adding special rules to the Contract, and any number of these can be used together in combination. Don't be too hasty changing your Contracts though, as each can only be changed once in that Vassal's lifetime, meaning you may be stuck with it for decades.ДЄs you gain more Innovations, you will slowly unlock the 'fine-print' options. Whether or not that is worth the -15 opinion penalty is another question, and depends on your circumstances at the time. Levies are another matter though, and while we're not talking about thousands of men, a powerful Duke could contribute an extra few hundred men by setting it on high. That said, you may want to tweak some under exceptional circumstances.Д«y the time Taxes reach a high enough point for them to be worth increasing, you'll already have enough gold to do what you need to, making either leaving it alone or reducing it a no-brainer. Fortunately they all begin at a standard which is where you'll be leaving them for the most part. Especially true in the early game, increasing Vassal obligations is rarely worth it, as a few percent more of a tiny amount is still a tiny amount, but a flat opinion hit can still hurt.ДЄs your Feudal Vassals have independent contracts concerning their contributions towards you, it can become a bit of a chore to handle them all individually. This means even with one set to High and the other set to None/Exempt, you will still suffer an opinion hit. The opinion modifiers for upping your demands are substantially more than for lowering, with it increasing to -15 then -25, and only decreasing to +5 then +10. Note: Hooks can also be used when the Vassal doesn't want to accept the change in Contract as well and the game will flag up the opportunity for you to use a Hook this way when one becomes available.

In this way you can maximise your Levies or Taxes depending on your needs.

This Tyranny hit can also be avoided altogether by lowering the other obligation in compensation. This can be countered by using a Hook on the Vassal to allow for both to be raised together.

You can only demand one Tyrannical change at a time, which means an increase of either Taxes or Levies but not both. Demand too much and you'll see their opinion fall, and that's if you can even get them to agree to the new terms at all. Implementing any of the higher obligations will incur both a permanent opinion modifier to the holder of that Title, and a temporary Tyranny penalty to all Vassals in your Realm.ДЄs you are changing the options, you can see the effects on the right hand side of the window which includes the change in Tax and Levy contributions but also lists the opinion modifier. These can be moved up or down by one tier per modification of the Contract. At the start of the game you will only have access to the basic contract which alters Taxes and Levies.

Increase vassal limit ck2