Index uses UMA's optimistic oracle to bring rebalance methodology onchain. The methodology determines whether a re-weighting proposal is valid and also specifies auction parameter values related to rebalancing execution.
proposalHash:624170ec238408ef83180e50a7be13836a80ffb01c3e9090e32b7dfda37b5662,rules:"I assert that this transaction proposal is valid according to the rules stored on IPFS under hash: QmaQmtteNydU2c6H9MJoKwVaspAsgMYJ44YE9mkNNuJmGL"
The IPFS hash can be appended to https://ipfs.io/ipfs/. So for the example above, https://ipfs.io/ipfs/QmdHftq7GK552HHVoLdU41DTzxSyFhhPnPoEEuySKM7nWK can be used to view the methodology.