what is the interval for changing timing belt. It has just under 70000 miles

for the 3.5L SFI & 3.5L SFI HO 6cyl>>Recommended replacement 100,000 miles, Federal emission; Recommended replacement 102,000 miles, California emission; Water pump driven by timing belt. It is recommended that you consider changing the water pump when replacing the belt; Interference engine....the 2.7L engine has chains.......no belt.....