LTIP Units may, in the sole discretion of the General Partner, be issued subject to vesting, forfeiture and additional restrictions on transfer pursuant to the terms of an award, vesting or other similar agreement (a “Vesting Agreement”). The terms of any Vesting Agreement may be modified from time to time in accordance with its terms. LTIP Units that are not subject to the terms of a Vesting Agreement or have vested and are no longer subject to forfeiture under the terms of a Vesting Agreement are referred to as “Vested LTIP Units”; all other LTIP Units are referred to as “Unvested LTIP Units.” Subject to the terms of any Vesting Agreement, a holder of LTIP Units shall be entitled to transfer his or her LTIP Units to the extent permitted under Article IX of the Agreement.