You can apply for Double Major Program at the end of the first year (two semesters) you spend in undergraduate education, at the beginning of the 3rd semester; at the end of the 2nd year (four semesters), at the beginning of the 5th semester. (Preparatory class is not included in this process.)

http://www.sis.itu.edu.tr/TR/mevzuat/yatay-cap-yandal-yonerge.php

You should contact the Dean of the Faculty to which your Double Major or Minor program is affiliated.

Students who want to leave the MINOR program should apply to the Registrar's Office with a petition.

A total of 10 preferences can be made on the same list.

There is no credit limit for taking courses.

If you have taken the course (s) which are the prerequisites of the course you want to take with a different code and this course does not appear in the list of equivalents, you must submit a petition to the dean of the faculty of your second major to make this course equivalent. Procedures will be made in line with the decision of the administrative board of faculty to which your second major is affiliated.

You have a maximum duration of 14 semesters as of the period you start the Double Major Program. http://www.sis.itu.edu.tr/TR/mevzuat/yatay-cap-yandal-yonerge.php

After graduating from your major, your education period can be extended for a maximum of two (2) semesters with the decision of the administrative board of faculty to which your minor program is affiliated.

You must apply to the faculty of your Double Major or Minor program with a petition explaining your status and request a permit or credit reduction.

If you do not register for DOUBLE MAJOR or MINOR for 2 consecutive semesters without permission, your DOUBLE MAJOR or MINOR registration will be cancelled.

The student must complete at least thirty (30) credits at the end of the first year and at least (60) sixty credits at the end of the second year in order to apply for the Double Major Program, and have passed the courses taken in the major undergraduate program until the semester he applied, the weighted grade average at the time of application must be at least 3.00 out of 4.00 and must be in the top 20% in terms of success ranking of the Major program.

The student who wants to do a double major in the programs for which the success ranking condition is required, must meet the success ranking requirement determined by the Higher Education Council of the relevant program in the year of enrollment, in addition to the other conditions specified in this directive.

http://www.sis.itu.edu.tr/TR/mevzuat/yatay-cap-yandal-yonerge.php

In order to apply for the YANDAL program, a student must have a minimum Cumulative Grade Point Average (CGPA) of 2.50 at the time of application and a minimum of thirty (30) credits at the end of the first year and at least sixty (60) credits at the end of the second year.

No, this is not required. However, for other conditions,  please view ITU - Undergraduate Programs Undergraduate Transfer, Double Major Program and Minor Program Directive. 

http://www.sis.itu.edu.tr/TR/mevzuat/yatay-cap-yandal-yonerge.php

Double Major and Minor applications are made at the beginning of each academic year for the 3rd and 5th semesters. You can apply if you meet the requirements, provided that the time you spent in your previous Higher Education Institution / Faculty is added to your total education time.

Double Major and Minor applications are made at the beginning of each academic year for the 3rd and 5th semester The maximum duration of students who transfer to a program other than the one they are studying at is calculated by subtracting the accepted class from the maximum duration of the program. Therefore, according to your adjustment result, you can apply if you meet the conditions, provided that the time you spent at your previous Higher Education Institution / Faculty is added to your total education time.

Yes, you need to have your Double Major Course Registration Form approved by your Double Major Advisor and submit it to the Registrar's Office.

The delivery date of the form will be announced on http://www.sis.itu.edu.tr/ along with the announcement of the course schedules.

You must apply to the Faculty of your second major regarding your request.

No, the grade of the course you make counted will not be used in your average calculation.

The separation of the courses for both of your majors in your transcript is made after the final grade entries are completed. Course separation for students registered in Double Major programs is completed within two months.

Yes, you can apply at the same time. In-house Transfer, Double Major and Minor applications are received through the Student Information System. You can use the same screen to make 10 preferences. The evaluation of the applications is done separately according to your preference priority, provided that the conditions determined for each are met.

There is no problem as long as you take the courses in your Double Major program completely.

Admission is made according to the credit achieved.

No, it doesn't. A single education certificate showing the courses you have taken in both majors together is given. The courses you take in the first major program are counted towards your first major average, the difference courses you have taken in the second major program are counted towards your second major average, and all the courses are counted towards your university grade point average.

Depending on the graduation of your first major, your first major grade point average is taken into account in the applications you will make for the Graduate (Master's Degree, Doctorate), and your university-wide GPA is taken into consideration for the applications you will make depending on your graduation from the second major program.

Students who have enrolled in an undergraduate program with the External Transfer Exam (DGS) cannot apply to the Double Major.

http://www.sis.itu.edu.tr/TR/mevzuat/yatay-cap-yandal-yonerge.php

If you gain the right to transfer to any program in the 3rd semester and make a final registration and apply again in the 5th semester in the next year, apply for Transfer, DOUBLE MAJOR, MINOR, and make a final registration, your enrollment in the DOUBLE MAJOR, MINOR program you registered the previous year is deleted.

No, there isn’t.

No, your application will not cause your registration in your DOUBLE MAJOR or MINOR program to be deleted unless you are registered.

No, you cannot apply. Students who start Irregular education can apply after 3 semesters at the earliest.

If you pass your FF / VF course until the evaluation date, your application will be evaluated.

http://www.sis.itu.edu.tr/TR/mevzuat/yatay-cap-yandal-yonerge.php

Yes, you can do.