
Use at least two subheadings for each section and subsection, or use none.The same level of heading or subheading should be of equal importance regardless of the number of subsections under it.Use as many levels as required in your paper to present the most organized structure.Headings and subheadings are not accompanied by letters or numbers.No heading is needed for the first part of a paper as it is already assumed as the introduction.

Level 5 Subsection under the three subsections heading Level 4 Subsection under a subsection of a subsection heading Level 3 Subsection of a subsection heading Level 1 encompasses a broader topic and levels 2 to 5 covers narrow to more detailed topics. Usually, short papers or articles use two to three levels, but longer papers necessitate up to five levels. The extent of using the different levels depends on the length and complexity of the paper. Levels indicate the hierarchy of importance and scope of each heading and subheading.
