BOZEMAN, Mont. -- Like it or not, drivers in Bozeman have to put down their phones.

The law banning the use of hand-held devices when driving took effect Tuesday.

It covers hand-held electronic devices such as cell phones and laptops. But Lieutenant Mark Johnson with the Bozeman Police Department said MP3 players and iPods are okay to use.

And drivers can still answer their phones, granted they have a hands-free device like Bluetooth.

"The bottom line is that you have to have a hands-free device if you want to use your cell phone in your car while you're driving" Lt. Johnson said.

But drivers won't feel the repercussions yet. Police are giving people time to make the adjustment.

They'll hand out yellow warning sheets to anyone caught violating the new ordinance the first month.

"We just felt the fairest way to spread the message was to give people thirty days to acclimate themselves to the change" Lt. Johnson said.

After that, drivers will face a $100 fine.

A few drivers on the street said they're ready for the change.

"It's a good thing" said driver Eric Bee. "Especially snowy, windy mountain roads. People being on their cell phones- not a good idea."

"I really try most of the time not to do it just because I feel like it's unsafe" said another driver Marlaina Talbott.

But others aren't adjusting as well.

One resident said he probably won't hang up the phone, unless he gets a ticket.

"I just did it this morning" said Kyle Watson, about talking on his cell phone while driving. "I then kind of realize, I'm like, 'Oh yeah, they passed that law where you can't use your cell phone.' And I was like, 'Is there a cop around?'"

Using a hand-held device while driving is a "primary offense," meaning police can pull you over solely for that and give you a citation.

Some other rules to keep in mind- using a cell phone on speaker phone and setting it down in your lap or on the seat next to you can still get you a ticket.

However, anyone reporting a health, fire, safety or police emergency are allowed to do so on their phones while driving.

Use of two-way radios for work is allowed, provided drivers hold a valid amateur radio operator license issued by the Federal Communications Commission.

And if a driver is pulled over on the side of the road and the car is not in gear, they are allowed to use their phones.