The concept that a potential violator should have "fair warning" that his actions are in violation has led to provisions that address specific noise problems. The sections below list those that are found in community noise ordinances. This provision is a "subjective immission" control. An evaluation of the noise disturbance is made at the listener without a sound level meter. This provision is mostly applied in residential zones such as homes, apartments and condominiums. Albuquerque, NM (Article 9-9) requires that such units the maximum permissible sound levels (Se section below) and recommend that those units be placed away from other residential units or on roof tops to diminish impact. Community control of airport created noise is limited to those sounds "not" related to flight operations. The community is able to control the land use around the airport however. This provision is a "subjective immission" control. Most relate to barking dogs and put an upper time limit for continuous sound from them. New Jersey (Chapter 13:1G) considers a violation if the sound is continuous for more than 5 minutes or intermittent for more than 20 minutes. They also consider it a defense to violation if the animal is provoked to bark. Connecticut (Chapter 442)exempts animal sounds while Anchorage, AK (Chapter 15.70) requires that continual violations permit the animal to be taken and put out for adoption. This provision contains only a curfew since most states protect shooting ranges from liability for noise disturbance. It can include a curfew requirement and a requirement for a public hearing if expansion of the range is desired. The provision may prohibit other weapons such as rocket propelled projectiles but may exempt unpowered weapons such as arrows. South Carolina (title 31 Chapter 18) requires that a sign stating SHOOTING RANGE-NOISE AREA be placed on all primary roads. Arizona (ARS 17-602) places a curfew from 10pm to 7 am. It also allows a tradeoff between the number of events and the maximum permitted sound level. New York (Chapter 150) also trades off overall levels with the duration of the sounds. Colorado (Article 25-12-109) declared that noise restrictions on shooting ranges is a detriment to public health, welfare, and morale. This provision is a "subjective immission" control. It is designed to limit the noise disturbance between living units as defined by an enforcement official. One criterion used to evaluate that disturbance is use of "plainly audible" but at the location of the listener instead of at a specific distance. However, Charlotte, NC (Sec. 15-69) limits indoor levels to 55 dB(A) be tween 9am to 9pm and 5 dB less at other times, but only from sound reproducing devices.