How would you issue an asset with a fee and then have a customized fee structures once the asset starts trading? Such as Maker/Taker model or customized fees when transmitting the asset after the issue. Where would details of that be in the Ripple docs?
You can find details about transfer fees on the Ripple Developer Center:
So, basically I would need some type of smart contracts made and if I want liquidity within the Ripple network, connect w Interledger?