The explicitly correlated variant is called by the command `MRCI-F12`, see section 20.8.

With no further input cards, the wavefunction definition (core, closed, and
active orbital spaces, symmetry) corresponds to the one used in the most
recently done SCF or MCSCF calculation. By default, a CASSCF reference space
is generated. Other choices can be made using the `OCC`, `CORE`, `CLOSED`, `WF`, `SELECT`,
`CON`, and `RESTRICT` cards. The orbitals are taken from the corresponding SCF or
MCSCF calculation unless an `ORBITAL` directive is given. The wavefunction may
be saved using the `SAVE` directive, and restarted using `START`. The `EXPEC` directive
allows to compute expectation values over one-electron operators, and the `TRAN`
directive can be used to compute transition matrix elements for one-electron
properties. Natural orbitals can be printed and saved using the `NATORB` directive.

For excited state calculations see `STATE`, `REFSTATE`, and `PROJECT`.

molpro@molpro.net 2019-03-18