Help With Join Compatibility

I was hoping someone could help me or put me on the right path to re-writing the join portion of this sql query in ANSI form for compatibility level 90. Im just not sure how to handle the three join statements and if they should go at the top in the FROM statement (dont know if that would mess up the rows produced). The query exists inside a stored proc.

SELECT
S.TYPE,
S.LOCATION_TYPE,
S.LOCATION_ID,
S.PLANNED_ARRIVAL,
S.PROJECTED_ARRIVAL,
S.ACTUAL_ARRIVAL,
S.PLANNED_DEPARTURE,
S.PROJECTED_DEPARTURE,
S.ACTUAL_DEPARTURE
FROM TAB1 S, TAB2 RL, TAB LS
WHERE
S.LOAD_ID = @V_CURRENTLOADID AND
(RL.REGION_ID = @REGION_ID AND
RL.ROUTE_DATE = @ROUTE_DATE AND
RL.ROUTE_ID = @ROUTE_ID) AND
(S.REGION_ID = RL.REGION_ID AND
S.ROUTE_DATE = RL.ROUTE_DATE AND
S.ROUTE_ID = RL.ROUTE_ID) AND
(S.LOCATION_ID =* LS.LOAD_LOCATION_ID AND

S.LOAD_ID =* LS.LOAD_ID AND
S.LOAD_STOP_ID =* LS.LOAD_STOP_ID)
ORDER BY RL.SEQ_NUM, S.ACTUAL_SEQUENCE_NUM;

Any help would be greatly appreciated