1.) For a person who has graduated a 4-year degree course, the requirement for him/her to be able to take the LET is to take additional 18 units as prescribed by law.
2.) They are most likely limited only to take the LET for BSEd and the equivalent Major Field of Specialization will depend on what course they finished.
3.) The 18 units should be distributed among the 4 clusters specified (Theory & Concepts,6 units + Methods & Strategies, 12 units) otherwise not all 18 units will be considered.
4.) The 30 units that a lot of people have been confused about actually came from the Ched Memorandum Order 30 stating that aside from the 18 units mentioned in item #3, Teacher Certificate Program (TCP) courses should have 12 units of experiential learning courses (Field Study and Practice Teaching)
5.) Apparently, PRC doesn't need to see the 12 units in one's TOR for him/her to be allowed to take the LET. They will only concentrate on the 18 units as mentioned in item #3.
6.) A lot of schools offering TCP will release the TOR only after the 30 (or more) units they require has been completed.
I got this info in a friend and opted to post it for those people still confused and don't have much knowledge about unit requirements to be eligible upon taking the Licensure Exam for Teachers.