How many years of holding a B2 driver's license are required to upgrade to an A1?

[StMalachi]

You can upgrade to an A1 driver's license after holding a B2 license for more than five years. Additionally, you must not have accumulated 12 penalty points in the current scoring cycle or the last three consecutive cycles to be eligible for the A1 upgrade. An A1 driver's license allows you to operate large passenger vehicles. Conditions required to upgrade to an A1 license: If you hold a C-class license, you cannot directly upgrade to an A1. You must first upgrade to a B-class or A3 license and hold it for at least three years before applying for an A1 upgrade. The applicant must be at least 22 years old and under 60 years old. No red-green color blindness is allowed, and uncorrected or corrected vision must be at least 5.0. Physical conditions such as height and weight must meet standards, with all limbs intact, including a fully functional thumb and at least three other fingers. No record of causing a fatal traffic accident with full or primary responsibility. Such a record disqualifies applicants from upgrading to A1, A2, or B2 licenses. Additional regulations for upgrading to medium-sized buses, tow trucks, or large passenger vehicle licenses: To upgrade to a medium-sized bus license, the applicant must have held a license for small cars, automatic transmission cars, low-speed trucks, or three-wheeled vehicles for at least three years, with no full penalty points in the last two consecutive scoring cycles. Alternatively, the applicant must have held a city bus or large truck license for at least one year with no full penalty points in the last scoring cycle. To upgrade to a tow truck license, the applicant must have held a medium-sized bus or large truck license for at least three years, with no full penalty points in the last two consecutive scoring cycles. Alternatively, the applicant must have held a large passenger vehicle license for at least one year with no full penalty points in the last scoring cycle. To upgrade to a large passenger vehicle license, the applicant must have held a medium-sized bus or large truck license for at least five years, with no full penalty points in the last three consecutive scoring cycles. Alternatively, the applicant must have held a tow truck license for at least two years with no full penalty points in the last scoring cycle. Temporary residents can only apply for upgrades to small cars, automatic transmission cars, low-speed trucks, or three-wheeled vehicles. Article 15: Applicants upgrading to large passenger vehicles, tow trucks, or medium-sized buses must not have any record of full or primary responsibility in fatal traffic accidents. Upgrading from B2 to A1 requires passing four exam sections: Section 1 (theoretical safety and civilized driving training), Section 2 (in-road safety and civilized driving training), Section 3 (out-road safety and civilized driving training), and Section 4 (theoretical safety and civilized driving training).