Introduction
The EMSAT Achieve Exam is a standardized test designed to assess a student's proficiency in various subjects. On the other hand, the EMSAT Nursing Exam specifically evaluates a student's knowledge and skills in the field of nursing. In this response, we will discuss whether it is possible to register for the EMSAT Achieve Exam if someone has already taken the EMSAT Nursing Exam.

Eligibility Criteria for EMSAT Achieve Exam
To determine whether a person who has already taken the EMSAT Nursing Exam can register for the EMSAT Achieve Exam, we need to review the eligibility criteria for the Achieve category.

1. Subject-specific Exams
The EMSAT Achieve Exam consists of subject-specific exams, including Mathematics, Science, English, and Arabic. These exams evaluate a student's knowledge and skills in these respective subjects.

2. Independent Registration
Each EMSAT Exam, including the Achieve category, requires independent registration. This means that a person who has taken the EMSAT Nursing Exam needs to register separately for the Achieve Exam.

3. No Restriction on Previous Exam
There is no specific restriction that prevents someone who has taken the EMSAT Nursing Exam from registering for the EMSAT Achieve Exam. As long as the individual meets the eligibility criteria for the Achieve category, they can register and take the exam.

Conclusion
In conclusion, it is indeed possible to register for the EMSAT Achieve Exam even if someone has already taken the EMSAT Nursing Exam. Both exams serve different purposes and assess different skills. Therefore, individuals who meet the eligibility criteria for the Achieve category can independently register for and take the EMSAT Achieve Exam.