DRAFT UGANDA STANDARD  
  DUS 966 -1 
Second  Edition  
2021 -mm-dd 
 
 
 Reference number  
DUS 966-1: 2021 
© UNBS 2021   
  
Surgical clothing — Specification - Part 1: Surgical gowns and 
drapes  
 DUS 966-1: 2021  
ii © UNBS 2021  – All rights reserved  
 Compliance with this standard does not, of itself confer immunity from legal obligations  
A Uganda Standard does not purport to include all necessary provisions of a contract. Users ar e 
responsible for its correct application  
© UNBS 200 7  
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilised in any 
form or by any means, electronic or mechanical, including photocopying and microfilm, w ithout prior written 
permission from UNBS.  
Requests for permission to reproduce this document should be addressed to  
The Executive Director  
Uganda National Bureau of Standards  
P.O. Box 6329  
Kampala  
Uganda  
Tel: 256 41 4 505 995  
Fax: 256 41 4 286 123  
E-mail: unbs@infocom.co.ug  
Web: www.unbs.go.ug  DUS 966 -1:2021  
© UNBS 2021 – All rights reserved  iii 
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ ............................  iv 
1 Scope  ................................ ................................ ................................ ................................ ......................  1 
2 Normative references  ................................ ................................ ................................ ............................  1 
3 Terms and definitions  ................................ ................................ ................................ ...........................  1 
4 Requirements  ................................ ................................ ................................ ................................ .........  4 
4.1 General requirement  ................................ ................................ ................................ .............................  4 
4.2 Performance requirements  ................................ ................................ ................................ ...................  4 
5 Packaging  ................................ ................................ ................................ ................................ ...............  5 
6 Labelling  ................................ ................................ ................................ ................................ .................  5 
7 Sampling  ................................ ................................ ................................ ................................ ................  6 
Annex  A (inform ative)  Guidance to users for selecting products  ................................ ...............................  7 
A.1 Performance levels  ................................ ................................ ................................ ................................  7 
A.2 Functional design  ................................ ................................ ................................ ................................ .. 7 
A.2.1  General  ................................ ................................ ................................ ................................ ...................  7 
A.2.2  Critical and less critical areas  ................................ ................................ ................................ ..............  7 
A.2.3  Size................................ ................................ ................................ ................................ ..........................  8 
A.2.4  Accessories  ................................ ................................ ................................ ................................ ...........  8 
A.2.5  Comfort  ................................ ................................ ................................ ................................ ...................  8 
A.3 Practical trials  ................................ ................................ ............................ Error! Bookmark not defined.  
Annex B (informative)  Information on further characteristics ................................ ................................ ...... 9 
B.1 Comfort  ................................ ................................ ................................ ................................ ...................  9 
B.2 Adhesion for fixation for the  purpose of wound isolation  ................................ ................................  9 
B.3 Liquid control  ................................ ................................ ................................ ................................ .........  9 
B.4 Flammability  ................................ ................................ ................................ ................................ .........  10 
Bibliography  ................................ ................................ ................................ ................................ ......................  11 
 DUS 966-1: 2021  
iv © UNBS 2021  – All rights reserved  
 Foreword  
Uganda National Bureau of Standards (UNBS) is a parastatal under the Ministry of Tourism, Trade and 
Industry established under Cap 327 , of the Laws of Uganda.  UNBS is mandated to co -ordinate the 
elaboration of standards and is  
(a) a member of International Organisation for Standardisation (ISO) and  
(b) a contact point for the WHO/FAO Codex Alimentarius Commission on Food Standards, and  
(c) the National Enquiry Point on TBT/SPS Agreements of the World Trade  Organisation (WTO).  
The work of preparing Uganda Standards is carried out through Technical Committees. A Technical 
Committee is established to deliberate on standards in a given field or area and consists of key stakeholders 
including government, academi a, consumer groups, private sector and other interested parties.  
Draft Uganda Standards adopted by the Technical Committee are widely circulated to stakeholders and the 
general public for comments. The committee reviews the comments before recommending th e draft standards 
for approval and declaration as Uganda Standards by the National Standards Council.  
The committee responsible for this document is Technical Committee UNBS/TC 307, Medical device s and 
equipment . 
This second edition cancels and repla ces the first edition ( US966: 2011 , all parts ), which has been technically 
revised.  DRAFT UGANDA STANDARD  DUS 966-1: 2021  
 
© UNBS 2021 – All rights reserved  1 
 Surgical clothing — Specification - Part 1: Surgical gowns and 
drapes  
1 Scope  
This Draft Uganda Standard specifies requirements, sampling and test methods fo r single -use and reusable 
surgical gowns and surgical drapes used as medical devices for patients, clinical staff and equipment intended 
to prevent the transmission of infective agents between patients and clinical staff during surgical and other 
invasive procedures.  
This standard does not apply to incision drapes or films.  
2 Normative references  
The following referenced documents referred to in the text in such a way that some or all of their content 
constitutes requirements of this document. For dated references, only  the edition cited applies. For undated 
references, the latest edition of the referenced document (including any amendments) applies  
ISO 22612 , Clothing for protection against infectious agents — Test method for resistance to dry microbial 
penetration  
ISO 22610 , Surgical drapes, gowns and clean air suits, used as medical devices, for patients, clinical staff and 
equipment — Test method to determine the resistance to wet bacterial penetration  
ISO 11737 -1, Sterilization of health care products — Microbiologic al methods — Part 1: Determination of a 
population of microorganisms on products  
ISO 9073 -10, Textiles — Test methods for nonwovens — Part 10: Lint and other particles generation in the 
dry state  
ISO 811 , Textiles — Determination of resistance to water pen etration — Hydrostatic pressure test  
ISO 13938 -1, Textiles — Bursting properties of fabrics — Part 1: Hydraulic method for determination of 
bursting strength and bursting distension  
ISO 9073 -3, Textiles — Test methods for nonwovens — Part 3: Determination of tensile strength and 
elongation  
US ISO 2859 -1, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by 
acceptance quality limit (AQL) for lot -by-lot inspection  
3 Terms and definitions  
For the purposes of this document, the  following terms and definitions apply. ISO and IEC maintain 
terminological databases for use in standardization at the following addresses:  
— ISO Online browsing platform: available at http://www.iso.org/obp . DUS 966 -1: 2021  
2 © UNBS 2021  – All rights reserved  
 3.1  
surgical drape  
drape covering patient or  equipment to prevent transfer of infective agents  
3.2 
surgical gown  
gown worn by a member of surgical team to prevent transfer of infective agents  
3.3  
colony forming unit CFU  
unit by which the culturable number of microorganisms is expressed  
Note 1 to en try:      The culturable number is the number of microorganisms, single cells or aggregates, able to 
form colonies on a solid nutrient medium  
3.4  
cleanliness  
freedom from unwanted foreign matter. Such matter can be microorganisms, organic residues or part iculate 
matter.  
3.5  
cleanliness — microbial  
freedom from population of viable micro -organisms on a product and/or a package. Note - In practical use, 
microbial cleanliness is often referred to as ‘bioburden’ . 
3.6  
critical product area  
product area with a  greater probability to be involved in the transfer of infective agents to or from the wound, 
e.g. front and sleeves of surgical gowns  
3.7  
infective agent  
micro -organism that has been shown to cause wound infections or that might cause infection in a memb er of 
the surgical team or the patient  
3.8  
less critical product area  
product area less likely to be involved in the transfer of infective agents to or from the wound  
3.9  
manufacturer  
natural or legal person with responsibility for the design, manufactur e, packaging and labelling of a device 
before it is placed on the market under his own name, regardless of whether these operations are carried out 
by that person himself or on his behalf by a third party  
3.10  
particle release  
release of fibre fragments a nd other particles during mechanical stress simulating handling and use  
3.11  
performance level  
discrete standard defined to classify products according to the performance requirements of this document  
Note 1 to entry: With the introduction of two performa nce levels, this document acknowledges the fact that products are 
challenged to differing extents during surgical procedures, dependent upon the duration, mechanical stress and liquid 
challenge throughout the surgical procedure.  DUS 966 -1: 2021  
© UNBS 2021  – All rights reserved  3 
 3.12  
standard performance  
classification addressing minimum performance requirements for various characteristics of products used as 
medical devices in invasive surgical procedures  
3.13  
high performance  
classification addressing elevated performance requirements for various charac teristics of products used as 
medical devices in invasive surgical procedures  
Note 1 to entry:  Examples of surgical procedures where elevated performance level should be considered are those 
where extensive exposure to liquid, mechanical stresses or longer  surgical procedures can be expected.  
3.14  
processor  
natural or legal person who processes products so that their performance complies with the requirements of 
this document  
Note 1 to entry:  A processor who places a product on the market is a manufacturer  in the sense of this document.  
Note 2 to entry: A processor of reusable products is often referred to as a ‘reprocessor’ and processing reusable products 
is often referred to as  ‘reprocessing’  
3.15 
resistance to liquid penetration  
ability of material to w ithstand the penetration of liquid(s) from one side of the material through to the  other  
3.16 
resistance to microbial penetration  
ability of material(s) to withstand penetration of micro -organisms from one side of the material through to the 
other  
3.17 
dry penetration  
effect of a combination of air movement and mechanical action by vibration on microbial penetration in dry 
condition  
3.18 
wet penetration  
effect of combination of wetness, pressure and rubbing on microbial penetration  
3.19 
reusable product  
product intended by the manufacturer to be reprocessed and reused  
3.20 
single -use product  
product intended to be used once only for a single patient  
3.21 
sterile field  
area created by sterile surgical drape material where aseptic technique is practised  
Note 1  to entry:  A sterile field can be practised e.g. on a back table.  
3.22 
surgical procedure  
surgical intervention performed by a surgical team  DUS 966 -1: 2021  
4 © UNBS 2021  – All rights reserved  
 3.23 
invasive surgical procedure  
surgical procedure penetrating skin or mucosa  
4 Requirements  
4.1 General requireme nt 
4.1.1   The surgical gowns and surgical drapes shall be free from any damage or defects.  
4.1.2 When tested in accordance with the relevant parts of ISO 10993,  the surgical gown s and surgical 
drapes shall be evaluated and approved for acceptable risk.  
4.1.3 If the manufacturer does not differentiate the product areas, all areas shall meet the requirements for 
critical product area.  
4.2 Performance requirements  
4.2.1  Surgical gown s shall conform to the requirements given in Table 1 when tested in accordanc e with 
the test methods specified therein.  
Table 1  — Performance requirements for surgical gowns  
S.No.  Characteristic  Requirement  Test method  
Standard performance  High performance  
Critical 
product 
area Less 
critical 
product 
area Critical 
product 
area Less critical 
product 
area 
i Microbial penetration –dry, CFU  Not 
required  ≤ 300a Not 
required  ≤ 300a ISO 22612  
ii Microbial penetration – wet , IB ≥ 2.8b Not 
required  6.0b c Not 
required  ISO 22610  
iii Cleanliness microbial /Bioburden 
(CFU/100cm2) ≤ 300  ≤ 300  ≤ 300  ≤ 300  ISO 11737 -1 
iv Particle release ,log 10 (lint count)  ≤ 4.0 ≤ 4.0  ≤ 4.0  ≤ 4.0  ISO 9073 -10 
v Liquid Penetration cm H 20 ≥ 20 ≥ 10 ≥ 100 ≥ 10 ISO 811  
vi Bursting strength ,kpa  ≥ 40 ≥ 40 ≥ 40 ≥ 40 ISO 13938 -1 
vii Tensile strength – Dry , N  ≥ 20 ≥ 20 ≥ 20 ≥ 20 ISO 9073 -3 
viii Tensile strength – Wet , N  ≥ 20 Not 
required  ≥ 20 Not 
required  
a Test conditions: challenge concentration 10B CFU/g talc and 30 minutes vibration time  
b b The least significant difference (LSD) for BI (Barrier Index) when estimated using ISO 22610 was found to be 0.98 at 98 %  confidence lev el. This is the 
minimum difference needed to distinguish between two materials thought to be different. Thus materials varying by up to 0.98 BI are probably not different. 
Materials varying by more than 0.98 BI are probably different. (The 95 % confidence level means that an observer would be correct 19 times out of 20 to 
accept these alternatives)  
c Barrier Index (IB) = 6.0 for the purpose of this standard means; no penetration, IB = 6.0 is the maximum achievable value. 
 DUS 966 -1: 2021  
© UNBS 2021  – All rights reserved  5 
 4.2.2  Surgical drapes  shall confor m to the requirements given in Table 2 when tested in accordance with 
the test methods specified therein.  
Table 2 — Performance requirements for surgical drape s 
S.No.  Characteristic  Requirement  Test method  
Standard performance  High performance  
Critical 
product 
area Less 
critical 
product 
area Critical 
product 
area Less critical 
product 
area 
i Microbial penetration –dry, CFU  Not 
required  ≤ 300a  Not 
required  ≤ 300a  ISO 22612  
ii Microbial penetration – wet , IB  ≥ 2.8b  Not 
required  6.0b c  Not 
required  ISO 22610  
iii Cleanliness microbial /Bioburden 
(CFU/100cm2) ≤ 300  ≤ 300  ≤ 300  ≤ 300  ISO 11737 -1 
iv Particle release ,log 10 (lint count)  ≤ 4.0 ≤ 4.0  ≤ 4.0  ≤ 4.0  ISO 9073 -10 
v Liquid Penetration cm H 20 ≥ 30 ≥ 10 ≥ 100  ≥ 10 ISO 811  
vi Bursting strength ,kpa  ≥ 40 ≥ 40 ≥ 40 ≥ 40 ISO 13938 -1 
vii Tensile strength – Dry , N  ≥ 15 ≥ 15 ≥ 20 ≥ 20 ISO 9073 -3 
viii Tensile strength – Wet , N  ≥ 15 Not 
required  ≥ 20 Not 
required  ISO 9073 -3 
a Test conditions: challenge concentration 108 CFU/g talc and 30 minutes vibration time  
b The least significant difference (LSD) for IB (Barrier Index) when estimated using ISO 22610 was found to be 0.98 at 95 % c onfid ence level. This is the 
minimum difference needed to distinguish between two materials thought to be different. Thus materials varying by up to 0.98 BI are probably not different. 
Materials varying by more than 0.98 BI are probably different. (The 95 % con fidence level means that an observer would be correct 19 times out of 20 to 
accept these alternatives)  
c Barrier Index (IB) = 6.0 for the purpose of this standard means; no penetration, IB = 6.0 is the maximum achievable value. 
5 Packaging  
5.1 The surgica l gown and surgical drapes  shall be packaged in suitable packaging materials, which shall 
protect product from contamination and damage during transportation, handling and storage.  
5.2 The packages shall be packed in accordance with ISO 11607 series. Only products of the same type 
and nominal size shall be packed together in a package and in a bulk container. Sterile -packed packages 
shall be packed in separate bulk containers.  
6 Labelling  
6.1 The packages shall be legibly and indelibly marked with the follo wing information:  
a) name of product as “Surgical gown”, or “Surgical drape” ; 
b) name and physical address of manufactur er; 
c) type of surgical clothing “reusable” or “single use” ; DUS 966 -1: 2021  
6 © UNBS 2021  – All rights reserved  
 d) performance level ; 
e) country of origin;  
f) date of manufacture;  
g) date of expiry;  
h) batch or lot number;  
i) quantity of product;  
j) size of the surgical clothing;  
k) colour of surgical clothing;  
l) storage conditions ;  
m) instruction of use ; and  
n) instructions for disposal after the useful life of the product  
6.2 In case of single use , the surgical gown and surgi cal drape shall be labelled sterile.  
6.3  In the case of the reusable surgical gowns and surgical drape, information on the appropriate 
processes to allow reuse, including cleaning, disinfection, packing and, if appropriate, the methods of 
sterilization of  the device to be re -sterilized, the number of reuses and any restriction to the reuse;  
6.4 if the surgical gown and surgical drape is supplied with the intention that it be sterilized before use, 
instructions for sterilization methods;  
7 Sampling  
Sampling  shall be done in accordance with  US ISO 2859 -1  DUS 966 -1: 2021  
© UNBS 2021  – All rights reserved  7 
 Annex  A 
(informative)  
 
Guidance to users for selecting products  
A.1 Performance levels  
This document introduces two performance levels (‘standard performance’ and ‘high performance’) for 
surgical gowns and d rapes, thereby acknowledging the fact that products are challenged to differing extents 
during surgical procedures, dependent upon the duration, mechanical stress and liquid challenge throughout 
the surgical procedure. The differentiation of ‘standard perf ormance’ from ‘high performance’ products is 
based on the barrier performance of the products in critical product areas.  
NOTE 1  For details of the differences in the required barrier performance, see Tables 1 and 2.  
By establishing two performance classes this document facilitates the assessment of the barrier performance 
of products. However, this document does not include specific recommendations for selecting surgical gowns 
or drapes with regard to the type of surgical procedure the product is to be used  with. 
The user will select surgical gowns and drapes based on their performance in order to meet the anticipated 
challenges of the surgical procedure (e.g. in terms of duration, mechanical stress and liquids). If the 
classification scheme provided by this  document is not considered suitable to address the anticipated 
challenges during use, discrete test results for the characteristics to be evaluated can be taken as a basis for 
selecting products.  
NOTE 2  The selection and use of surgical gowns and drapes f or specific surgical procedures can be covered by risk 
assessment and quality management carried out by the user and can be subject to local, regional or national infection 
prevention regime, guidelines, directives or regulation.  
A.2 Functional design  
A.2.1 General  
This document does not include specific requirements for the functional design of surgical gowns and drapes. 
The impact of functional design on the performance of products is acknowledged by requiring testing on the 
finished product including pot ential weak spots.  
However, the functional design – in particular critical and less critical areas, the over -all size of the product 
and the characteristics of accessories (if any) – and its impact on the working situation (thermophysiological 
comfort and ergonomics) should be considered when selecting products for use.  
A.2.2  Critical and less critical areas  
This document acknowledges the fact that not all areas of the product are involved in the transfer of infective 
agents to or from the wound to the same  extent. In order to set different performance requirements and allow 
for different product areas this document introduces ‘critical product areas’ and ‘less critical product areas’.  
NOTE 1  In general ‘critical product areas’ include those areas most likel y to be exposed to blood and other body liquids 
as, e.g. front and sleeves of surgical gowns or the parts of surgical drapes adjacent to the surgical wound. The back of a 
surgical gown and part of surgical drapes being far from the wound are usually consid ered as ‘less critical product areas’.  
NOTE 2  For details of the differences in the required performance of ‘critical product areas’ and ‘less critical product 
areas’, see Tables 1 and 2.  DUS 966 -1: 2021  
8 © UNBS 2021  – All rights reserved  
 This document does not include provisions for the size and position of ‘critical’ or ‘less critical’ product areas. 
The user has to decide whether or not size and position of ‘critical’ and ‘less critical’ product areas are suitable 
to meet the anticipated challenges of a certain surgical procedure.  
A.2.3  Size 
This documen t does not include provisions for specifying the size of products in a standardized way.  Selecting 
products of suitable size in order to appropriately cover persons, patients and equipment is up to the user in 
order to ensure the intended use of the respec tive product.  
Note Using products of inappropriate size might lead to insufficient covering, i.e. jeopardize the aim of minimizing 
the transfer of infective agents, and might impact freedom or safety of movements (e.g. with gowns to small or too big for 
the wearer).  
A.2.4  Accessories  
This document does not include specific provisions for accessories such as, e.g. cuffs or buttons. As 
accessories do therefore not need to meet any requirements of this document, the user should assess the 
functional design wit h consideration to the placement of accessories so that the intended uses of the products 
are not compromised. The user should also assess the quality of any accessories in order to ensure that the 
intended uses of the products are not compromised.  
A.2.5  Comfort  
A.2.5.1  General  
The functional design of products has an impact on the thermophysiological comfort.  
Note 1  For more information on comfort, see B.1. 
The user when selecting products for use should assess the comfort of products in order to exclude any 
significant limitations of the intended use of the product. Combinations of materials and design of clothing 
systems (including technical underwear or garments) that will minimize the physiological stress during work 
are to be encouraged.  
NOTE 2 The co mfort of surgical gowns and drapes depends on various characteristics, most of which can be 
evaluated using standardized test methods. More easily the overall comfort of surgical gowns and drapes can 
be assessed with trials (i.e. personal experience).  
A.2.5.2 Surgical gowns  
The overall comfort of surgical gowns can be influenced by a number of factors: design, fit, breathability, 
weight, surface thickness, electrostatic properties, colour, light reflectance, odour and skin sensitivity.  
Other important varia bles that can influence comfort include undergarments, health and physical conditions, 
workload, mental stress and environmental conditions, such as temperature, relative humidity, and air 
changes in operating room.  
The perception of comfort is subjective and can be influenced by one or a combination of the aforementioned 
factors.  
A.2.5.3  Surgical drapes  
Surgical drapes should be flexible so that they will cover the patient closely and smoothly, allowing placement 
and manipulation of instruments and draping  of other related equipment, such as ring stands, back tables, and 
Mayo stands.  Liquid control is important for surgical drapes in operations with much blood or other liquids 
such as saline.  DUS 966 -1: 2021  
© UNBS 2021  – All rights reserved  9 
 Annex B  
(informative)  
 
Information on further characteristics  
B.1 Comfort  
The concept of comfort is based on several different factors, such as physiological comfort, ease of movement 
or factors t hat will influence and/or affect the individual's satisfaction with the product.  
The thermophysiological comfort of a product depends on such properties as its thermal resistance, air 
permeability, water -vapour resistance, drapeability, tactile comfort and  other properties like stretchability, 
weight, size, fit, fibres and manufacture.  
Note 1  Drapeability addresses the ability of a material to conform to a given shape or object.  
Note 2  Water -vapour resistance is defined as the water -vapour pressure differen ce between the two faces of a 
material divided by the resultant evaporative heat flux per unit area in the direction of the gradient. The evaporative heat 
flux can consist of both diffusive and convective components. EN ISO 11092 provides a test method for  measuring the 
thermal and water -vapour resistance under steady -state conditions.  
Note 3  Thermal resistance is a property of a material that can be measured by a thermal manikin in view to determine 
important parameters relevant to clothing thermal comfort . 
Note 4 Tactile comfort also indicated as softness, is highly dependent on the fibre smoothness and the finish 
technologies.  
Note 5   Properties such as stretchability, size fit, weight, can be measured.Discomfort properties, such as rustling 
tendency, sof tness and skin irritation are difficult to measure. Evaluation should be based on trials of the products or 
practical experience.  
B.2 Adhesion for fixation for the purpose of wound isolation  
Adhesives are used to attach materials during the preparation for  an operation and to attach drapes to a 
patient on the operating table. Different adhesives are chosen for different materials, e.g. material to material 
and material to the skin.  In choosing an adhesive, the following considerations should be taken into a ccount : 
a) adhesives should not cause damage to the skin.  
b) when used on reusable materials, the adhesives should be removable during processing without 
damaging the material.  
c) the adhesive should create a seal -off from liquid and secure a sterile field.  
B.3 Liquid control  
The control of liquids, like body liquids or other liquids used or generated close  to the wound during a surgical 
procedure, is regarded relevant to reduce the risk of transfer of infective agents.  DUS 966 -1: 2021  
10 © UNBS 2021  – All rights reserved  
 B.4 Flammability  
Though surgical gowns and dra pes do not provide ignition sources or oxidizer both products might  serve as 
fuel, when a fire breaks out. Manufactures are required to supply information regarding fire  risks  in relation  to 
the use of their products.  DUS 966 -1: 2021  
© UNBS 2021  – All rights reserved  11 
 Bibliography  
[1] EN 13795 -2:2019 , Sur gical drapes, gowns and clean air suits, used as medical devices for patients, 
clinical staff and equipment – Part 2: Test methods  
[2] ISO 13485:2016, Medical devices — Quality management systems — Requirements for regulatory 
purposes  
[3] US 966 -1:2011 , Me dical devices — Surgical gowns, drapes and clean air suits — Part 1: General 
requirements   
[4] US 966 -2:2011, Medical devices — Surgical gowns, drapes and clean air suits, — Part 3: Test 
methods  
[5] US_966 -1_2011_78_Medical devices - Surgical gowns, drapes  and clean air suits, - Part 1 General 
requirements  
 DUS 966-1: 2021  
© UNBS 2021 – All rights reserved  13 
 Certification marking  
Products that conform to Uganda standards may be marked with Uganda National Bureau of Standards 
(UNBS) Certification Mark shown in the figure below.  
The use of the UNBS Certification Mark is governed by the Standards Act, and the Regulations made 
thereunder. This mark can be used only by those licensed under the certification mark scheme operated by 
the Uganda National Bureau of Standards and in conjun ction with the relevant Uganda Standard. The 
presence of this mark on a product or in relation to a product is an assurance that the goods comply with the 
requirements of that standard under a system of supervision, control and testing in accordance with t he 
certification mark scheme of the Uganda National Bureau of Standards. UNBS marked products are 
continually checked by UNBS for conformity to that standard.  
Further particulars of the terms and conditions of licensing may be obtained from the Director, Uganda 
National Bureau of Standards.  
 
 DUS 966-1: 2021    
 
ICS 11.040.30 
Price based on nn pages  
© UNBS 2021 – All rights reserved