ILS is a button on the UFC, ACLS is a button on the UFC. ILS should enter freq, ACLS should be for channels for ACLS. F-16 has ILS and you enter freq, Superhornet has the same. The F-14 and Harrier use preset channels which have to be setup prior to take off. So for the F-14 and Harrier they need in the ME the ability to select preset ILS channels which is a channel for a particular runway or aircraft carrier.
eg F-14 flying to Nellis would have channel 3 for Nellis ILS.
An F-16, Hornet or Superhornet, the pilots can enter the freq for the ILS on the UFC.