I worked with Bill Ray on a story regarding PLT products (see http://www.theregister.co.uk/2009/01/15/bt_vision_interference/ ) earlier this year.
Whilst the HPA products are not as bad as UPA products, they still cause massive amounts of interference to Short Wave bands when they transfer data. I am a member of the UKQRM group (www.ukqrm.org) who are lobbying Ofcom, BERR and Trading Standards to enforce UK EMC law.
Recently a petition was started and was answered by number 10
Which states "As with all electrical and electronic products sold in the UK, Power Line Technology (PLT) equipment is required to meet the relevant regulations before it can be placed on the market. In particular, it must comply with the Electromagnetic Compatibility Regulations 2006 (the EMC Regulations) "
A key part of the EMC regs are the "Essential requirements" which state:
4.—(1) A reference to “essential requirements” in relation to equipment is a reference to the requirements set out in paragraph (2) and in the case of fixed installations shall include the requirements set out in regulation 5.
(2) Equipment shall be designed and manufactured, having regard to the state of the art, so as to
(a) the electromagnetic disturbance it generates does not exceed a level above which radio
and telecommunications equipment or other equipment cannot operate as intended; and
(b) it has a level of immunity to the electromagnetic disturbance to be expected in its intended use which allows it to operate without unacceptable degradation of its intended use.
Part III, General Requirements - Apparatus:
15.No person shall place on the market apparatus unless either the following requirements, or
the corresponding requirements of the EMC Directive as implemented under the law of another state in the Community, are met—
(a) the apparatus is compliant with the essential requirements;
16. No person shall put into service apparatus unless it complies with the essential requirements when properly installed, maintained and used for its intended purpose.
Regarding CE marking:
21.—(1) For the purposes of these Regulations, the CE marking shall be regarded as properly affixed in relation to apparatus if the requirements of this regulation are complied with.
(a) the apparatus is compliant with the essential requirements
As you can see from the Youtube clip in Bills article, significant amounts of interference are being produced by PLT systems, and are not compliant with Essential Requirements.
I also have an HPA presentation which states "Safety, immunity and harmonics are correct but almost all PLC devices pass over the CISPR 22 class A, B limits so failed the test and we could not generate (directly) the DoC (Declaration of Conformity) needed for Europe"
We have test data for a three PLT products. The measurements were conducted in a UKAS accredited lab and I can provide.