On the 2014 Dinghy Towing guide it just says except the ST and the electric models. Automatic transmission must be in neutral (ignition must be "ON" before shifting into NEUTRAL). See owner's guide for more info. The only restriction was 70mph.
found this on another forum from the manual: 2014 Ford Focus Vehicles with an Automatic Transmission but No Push Button Start System
Note: There must be battery power to properly move the transmission’s
internal components to position N in Step 3. In addition, moving the
gearshift to position N without first turning the ignition to the on (II)
position limits the towing capability to 35 mph (56 km/h) and 50 miles
(80 kilometers).
1. Release the parking brake.
2. Turn the ignition to the on (II) position.
3. Press the brake pedal, then move the gearshift to position N.
4. Wait for TRANSMISSION READY to appear in the multi-function
display, then turn the ignition to the off (0) position and release
the brake pedal.
5. Disconnect the negative (black) cable from the battery.
(The anti-theft system does not function until the battery cable is
reconnected.) See Changing the vehicle battery in the
Maintenance chapter when disconnecting and reconnecting the
battery cable.
• The maximum towing speed is 70 mph (113 km/h).
• There is no limitation on towing distance.
When done towing, start the engine within 15 minutes of reconnecting
the battery cable. When reconnecting that cable, tighten it until it is
snug against the terminal. Be careful not to over-tighten.
Funny that the Focus is NOT listed on the 2015 Dinghy Towing Guide.