Nolacopusmc
*Banned*
This covers any checkpoint. So yes, prior notice must be given. In State v. Jackson, 764 So.2d 64, they make it clear that acording to the Louisiana consititution, no distenction can be made when talking about checkpoints but in order for it not to violate the 4th amen. the above steps must be followed.
This is not my opinin but the law.
With that said, please don't ever consent to a field test. You should never trust a LOE to decide if you are over the limit and if you refuse a field test there is no penalty for doing so.
Now forcing you to take a breath test or blood test is another legal problem not so clearly defined by the courts.