**Codex Standard for Orange**

The Codex Standard for Orange is a set of guidelines and criteria established by the Codex Alimentarius Commission to ensure the quality and safety of oranges. This standard defines various criteria for oranges, including quality, size, and tolerance levels. In this response, we will discuss three classes of oranges and the provisions concerned with tolerance in terms of quality or size.

**Three Classes of Oranges**

The Codex Standard for Orange categorizes oranges into three classes based on their quality and appearance. These classes are:

1. Class I: This class includes oranges that meet the highest quality standards. Oranges in this class should be of good quality, free from any defects, and have a characteristic color and appearance. They should also be free from any foreign matter or damage caused by pests or diseases.

2. Class II: Oranges in this class are of a slightly lower quality compared to Class I. They may have minor defects or blemishes that do not affect their overall quality or edibility. However, they should still possess the characteristic color and appearance of oranges.

3. Class III: This class includes oranges that may have significant defects or blemishes but are still suitable for consumption or processing. Oranges in this class may have some discoloration, damage, or other defects that do not render them inedible or unsafe.

**Provisions Concerning Tolerance**

The Codex Standard for Orange also includes provisions concerning tolerance levels for quality and size. These provisions ensure that oranges falling within certain tolerances are still considered acceptable for consumption or processing. The tolerance levels are as follows:

1. Tolerance for Quality: Oranges within each class are allowed to have a certain percentage or quantity of defects or blemishes. For example, Class I oranges may have a tolerance of up to 5% defects, while Class II oranges may have a tolerance of up to 10% defects. These tolerance levels are determined based on the overall quality of the oranges in each class.

2. Tolerance for Size: Oranges are also subject to tolerance levels regarding their size. The Codex Standard defines the minimum and maximum size limits for oranges in each class. Oranges falling within these size limits are considered acceptable. Any oranges outside of these limits are deemed to be of unacceptable size and may not meet the criteria for their respective class.

These provisions concerning tolerance levels ensure that oranges meeting the specified criteria are classified and marketed accordingly. The Codex Standard for Orange aims to maintain consistency and quality in the orange industry, providing consumers with oranges that meet their expectations in terms of appearance, quality, and size.