There's only a small page on the Timing Belt in the Manual
1999 Accord Owners Manual"Timing Belt
The timing belt and balancer belt (4-cylinder models only) should normally be replaced at the intervals show in the maintenance schedule.
Replace these belts at 60,000 miles (U.S.) or 100,000 km (Canada) if you regularly drive your car in one or more of these conditions
In very high temperatures
(over 110F)
In very low temperatures
(under -20F)"
Thats all it states in the manual
In the maintenance schedule
It says to replace it at:
105,000 Miles