1A227 Category 1A

High-density (lead glass or other) radiation shielding windows, having all of the following characteristics (see List of Items Controlled), and “specially designed” frames therefor.

Category 1: Special Materials and Related Equipment, Chemicals, “Microorganisms,” and “Toxins”

Reasons for control

• NP: Nuclear nonproliferation
• AT: Anti-terrorism

Country chart

List-based license exceptions

Items

1. Items: a. A “cold area” greater than 0.09 m 2;
2. b. A density greater than 3 g/cm 3; and
3. c. A thickness of 100 mm or greater.

Related controls

(1) See ECCNs 1E201 (“use”) and 1E202 (“development” and “production”) for technology for items controlled by this entry. (2) Equipment “specially designed” or prepared for nuclear reactors and reprocessing facilities is subject to the export licensing authority of the Nuclear Regulatory Commission (see 10 CFR part 110).

Source: eCFR, version 2026-08-01, retrieved 2026-08-20T04:04:59+00:00.