Required. (General Technology Note) - As applied to technology or software, refers to only that portion of technology or software which is peculiarly responsible for achieving or exceeding the controlled performance levels, characteristics or functions. Such required technology or software may be shared by different products. For example, assume product X is controlled on the CCL if it operates at or above 400 MHz and is not controlled if it operates below 400 MHz. If production technologies A, B, and C allow production at no more than 399 MHz, then technologies A, B, and C are not required to produce the controlled product X. If technologies A, B, C, D, and E are used together, a manufacturer can produce product X that operates at or above 400 MHz. In this example, technologies D and E are peculiarly responsible for making the controlled product and are thus required technology under the General Technology Note. (See the General Technology Note.)
15 CFR § 772.1
The following are definitions of terms as used in the Export Administration Regulations (EAR). In this part, references to the EAR are references to 15 CFR chapter VII, subchapter C. Those terms in quotation marks refer to terms used on the Commerce Control List (CCL) (supplement no. 1 to part 774 of the EAR). Parenthetical references following the terms in quotation marks (i.e., (Cat 5)) refer to the CCL category in which that term is found. If a term is used in only one Export Control Classification Number (ECCN) on the CCL, then that term will not appear in this part, but will be defined in the Related Definitions paragraph in the List of Items Controlled Section of that ECCN.