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3) Cascaded proxies. a. Section 4.1.3 Statement to be inserted: "Whenever the requester is another transformation proxy, the receiving proxy MUST treat it as a non-browser agent. The receiving proxy SHOULD rely upon the presence of alternative X-Device- HTTP fields and the values in the via HTTP field as per 4.1.6.1 to detect that it is placed downstream from a chain of proxies." b. Section 4.3.2 Statement to be inserted: "As per section 14.46 of RFC2616, 214 Transformation applied MUST be added by an intermediate cache or proxy if it applies any transformation changing the content-coding (as specified in the Content-Encoding header) or media-type (as specified in the Content-Type header) of the response, or the entity-body of the response, unless this Warning code already appears in the response. A proxy receiving a 214 code MUST NOT change it." c. Section D.4 Eliminate entirely. Rationale: together with 4.3.1, 4.3.2, 4.1.2, 4.1.5.5, 4.1.6.1, 4.3.6.1, these changed sections entirely solve the issue of cascading proxies in a standards-compliant way.