. N4 2. Proposals for new

3. Questions to the subgroup T5

(1) Do you agree that the current parameters in the FK5 system must be abandoned for being consistent with the newly adopted ICRS ?

(2) Do you agree that, for consistency with ICRS, the current formulation combining the motions of the equator and of the ecliptic wrt the CRS has to be abandoned ?

(3) Do you agree that the angle of Earth rotation must no more be reckoned from the true equinox which is moving due to precession and nutation and which is referred to the ecliptic of date ?

(4) Do you agree that new parameters for the orientation of the Earth's axis in the CRS must include both precession and nutation ?

(5) Which parameters (either among the parameters presented previously or new ones) do you propose to use for the EOP referred to the ICRS in place of the current parameters referred to the FK5 ?

(6) Which origin on the moving equator do you prefer ?

(7) Do you agree that in order to provide Earth rotation form the orientation angle around the axis of the CEP, it is necessary to use an origin without any instantaneous rotation wrt the CRS around this axis ?