Dec 20 (Reuters) - Hydro One Ltd H.TO :
* ONTARIO ENERGY BOARD ASKS BOTH HYDRO ONE AND NEXTBRIDGE TO RETURN WITH A 'NOT-TO-EXCEED' PRICE ON CRITICAL NORTHERN TRANSMISSION LINE
* HYDRO ONE - OEB HAS ASKED BOTH PROPONENTS TO RESPOND WITH A NOT-TO-EXCEED PRICE BY JANUARY 31, 2019 AS FINAL STEP BEFORE ISSUING DECISION & ORDER