The design and charting of new procedures is not usually a very time-consuming process. A new procedure is typically completed within one month from the initial order, and can be delivered to the customer without delay.
All new or updated procedures to be published in the AIP, however, is bound by the Aeronautical Information Regulation and Control (AIRAC) system. The AIRAC system is designed with a set of worldwide and common implementation dates which can be found at: https://www.nm.eurocontrol.int/RAD/comm ... dates.html
The system is based upon a series of effective dates of intervals of 28 days. Information provided under the AIRAC system shall be published in paper copy form and shall be distributed by the AIS unit at least 42 days in advance of the effective date with the objective of reaching recipients at least 28 days in advance of the effective date. Whenever major changes are planned and where additional notice is desirable and practicable, a publication date of at least 56 days in advance of the effective date should be used.