2332 368 B is no PICS coverage for these features Add PICS subclauses. This will also clarify what features are interoperable with devices. The intended (and unintended) impacts on non-S1G devices is critical understanding. Accepted. TGah editor to add the B and PICS table presented in 11-14-587r0. 2626 368 B The draft doesn't include PICS specifying which features are optional and which are mandatory Add the PICS Accepted. TGah editor to add the Annex B and PICS table presented in 2830 368 B The draft does not have PICS. Add PICS, please. Accepted. TGah editor to add the Annex B and PICS table presented in 2933 368 B It is not clear whether each funtion is mandatory or optional because this draft does not contain PICS formulas. Please add "Annex B" as well as other amendments. Accepted. TGah editor to add the B and PICS table presented in 11-14-587r0. TGah editor: Please add Annex B: Protocol Implementation Conformance Statement (PICS) proforma B.2 Abbreviations and special symbols S1GM Sub 1 GHz (S1G) medium access control (MAC) features S1GP Sub 1 GHz (S1G) physical layer (PHY) features RL Relay features S1G
B.4 PICS proforma—IEEE Std 802.11ah Change B.4.3 as follows (only changed rows are shown): Note: CF32 and CF33 are ANA numbers and may be changed in the future based on ANA allocation. B.4.3 IUT configuration Item IUT configuration References Status Support What is the configuration of the IUT? *CF1 Access (AP) 4.3 (Componen ts of the IEEE Std(#130) 802.11 architecture ) O.1 CF33: M Yes  No  *CF2 Independent station (neither an AP nor a mesh STA) 4.3 (Componen ts of the IEEE Std(#130) 802.11 architecture ) O.1 CF33: M Yes  No  Operation in a PBSS 4.3.3 (The personal BSS CF2&(not CF25 OR not CF32):O Yes  No  *CF6 Orthogonal frequency division multiplexing (OFDM) PHY --- O.2 CF32:M(11ah) Yes  No  * CF12 Quality of service (QoS) supported 9.21 (HCF), 9.23 (block STA), STA) O (CF16 OR CF21 OR CF25:M(11ad) CF32:M Yes  No  N/A 
*CF21 Mesh station 4.3.17 (Mesh BSS: IEEE Std(#130) 802.11 wireless mesh network) (not CF25) & (not CF32): O.1(#2485) Yes  No  N/A  * CF32 Sub 1 GHz (S1G) features 8.4.2.170k (S1G Capabilities element) O.2 Yes  No  N/A  *CF33 Relay 9.49 (Relay operation) O.1 Yes  No  N/A  B.4.4 MAC protocol Change table B.4.4.2 as follows (only changed rows are shown): Note: FT43 and all subsequent numbers, FR44 and all subsequent numbers are ANA numbers and may be changed in the future based on ANA allocation. B.4.4.2 MAC frames Item MAC frame References Status Support Is transmission of the following MAC frames supported? ... FT7 Beacon Clause 8 (Frame formats) (not CF2.3 & not CF32):M (CF27& not CF32):M Yes  No  N/A  ... FT43 TACK Clause 8 formats) (CF32 & S1GM6.2):M (CF32 & not S1GM6): O Yes  No  N/A 
FT47.4 STA Information Announcement (CF2 & CF32 & S1GM18):M Yes  No  N/A  FT47.5 EDCA Parameter Set frame (CF1 & CF32):O Yes  No  N/A  FT47.6 Activity Specification frame (CF2 & CF32 & S1GM21):M Yes  No  N/A  FT47.7 TWT Setup frame (CF32 & S1GM6.3):M Yes  No  N/A  FT47.8 TWT Teardown (CF32 & Yes  No  N/A  FT47.9 Sectorized Group ID List frame (CF1 & CF32 & S1GM11):M Yes  No  N/A  FT47.10 Sector ID feedback frame (CF2 & CF32 & S1GM11):M Yes  No  N/A  FT47.11 Header Compression Request frame (CF32 & S1GM16):O Yes  No  N/A  FT47.12 Header Compression Response frame CF32: M Yes  No  N/A  FT48 Action frame 8.6.25 (Relay Action frame details) RL1:M Yes  No  N/A  FT48.1 Reachable Address Update RL1:M Yes  No  N/A 
FT49 Flow Control Action frame 8.6.26 (Flow Control Action details) CF32:M Yes  No  N/A  FT49.1 Flow Suspend frame (CF32 & S1GM17.1):M Yes  No  N/A  FT49.2 Flow Resume frame (CF32 & S1GM17.1):O Yes  No  N/A  FT50 Control Response MCS Negotiation frame 8.6.27 (Control Response MCS Negotiation frame details) CF32 & S1GM28:M Yes No N/A FT50.1 Control Response MCS Negotiation Request (CF32 & S1GM28):O Yes No N/A FT50.2 Control Response MCS Negotiation Response (CF32 & S1GM28):M Yes No N/A FT51 Short frame 8.8 (MAC frame format for short frames) CF32:O Yes  No  N/A  FT51.1 STACK frame (CF32 & S1GM6.2 or S1GM6.1):M Yes  No  N/A  FT51.2 BAT frame (CF32 & S1GM6.2 & QB4.1 ):M Yes  No  N/A  FT51.3 Short Action frame CF32:O Yes  No  N/A 
FR47.2 NDP PS-Poll (CF1 & CF32):O Yes No N/A FR47.3 NDP ACK CF32:M Yes No N/A FR47.4 NDP PS-Poll-Ack (CF2 & CF32 & FT46.2):M Yes No N/A FR47.5 NDP BlockAck (CF32 & HTM5.3):M Yes No N/A FR47.6 NDP Beamforming Report Poll (CF2 & CF32):O Yes No N/A FR47.7 NDP Paging (CF32 & S1GM6.9):M Yes No N/A FR47.8 NDP Probe Request (CF1 & CF32):M Yes No N/A FR47.9 NDP CF-End (CF2 & CF32):O Yes No N/A FR48 S1G Action frame 8.6.24 (S1G Action frame details) CF32:M Yes No N/A FR48.1 AID Switch Request frame (CF2 & CF32 & (S1GM13 or S1GM18)):M Yes No N/A FR48.2 AID Switch Response (CF1 & CF32 & (S1GM13 or S1GM18)):M Yes No N/A FR48.3 Synch Control frame (CF2 & CF32 & Yes No N/A
FR48.4 STA Information Announcement (CF1 & CF32 & S1GM18):M Yes No N/A FR48.5 EDCA Parameter Set frame (CF2 & CF32):M Yes No N/A FR48.6 Activity Specification (CF1 & CF32 & S1GM21):M Yes No N/A FR48.7 TWT Setup frame (CF32 & S1GM6.2):M Yes No N/A FR48.8 TWT Teardown frame (CF32 & S1GM6.5):M Yes No N/A FR48.9 Sectorized Group ID List frame (CF2 & CF32 & S1GM11):M Yes No N/A FR48.10 Sector ID feedback frame (CF1 & CF32 & S1GM11):M Yes No N/A FR48.11 Header Compression Request frame CF32: M Yes No N/A FR48.12 Header Compression Response (CF32 & FT47.11):M Yes No N/A FR49 Relay Action frame 8.6.25 (Relay Action frame details) (CF1 & CF32):O Yes No N/A FR49.1 Reachable Address Update frame RL1:M Yes No N/A
FR50 Flow Control Action frame 8.6.26 (Flow Control Action frame details) (CF2 & CF32):O Yes No N/A FR50.1 Flow Suspend frame (CF2 & CF32 & S1GM17):M Yes No N/A FR50.2 Flow Resume (CF2 & CF32 & S1GM17):M Yes No N/A FR51 Control Response MCS Negotiation frame 8.6.27 (Control Response MCS Negotiation frame details) CF32 & S1GM28:M Yes No N/A FR51.1 Control Response MCS Negotiation Request (CF32 & S1GM28):M Yes No N/A FR51.2 Control Response MCS Negotiation Response (CF32 & S1GM28):M Yes No N/A FR52 frame 8.7 (MAC format for short frames) CF32:M Yes No N/A FR52.1 STACK frame (CF32 & S1GM6.1):M Yes No N/A FR52.2 BAT frame (CF32 & & QB4.1 or):M Yes No N/A FR52.3 Short Action frame CF32:M Yes No N/A
FR52.4 Action No Ack frame CF32:M Yes No N/A FR52.5 Short Probe Response frame CF32:O Yes No N/A FR52.6 Dynamic A-MSDU format (CF32 & Yes No N/A FR52.7 Short Data frame CF32:M Yes No N/A Change B.4.4.2 as follows (only changed rows are shown): B.4.4.4 MAC addressing functions Item MAC Address function References Status Support Are the following MAC Addressing functions supported? ... AD12 Group addressed Data frame addressing (4 address frame) 8.2.3 (General format), 8.2.4.1 (Frame Control field), 8.2.4.3 (Address fields) CF33: O RL2:O CF1: O CF2: O Yes  No  N/A  AD13 Individually addressed Data frame addressing (4 address frame) CF33: O RL2:O CF1: O CF2: O Yes  No  N/A  AD14 Group addressed short Data frame addressing (4 address frame) 8.8 (MAC format CF33: O RL2:O Yes  No  N/A 
for short frames) 9.49.2 and forwarding of group addressed relay frames) 9.49.1 and forwarding of addressed relay frames) CF32: O AD15 Individually addressed short Data frame addressing (4 address frame) CF33: O RL2:O CF32: O Yes  No  N/A  Change table B.4.13 as follows (only changed rows are shown): B. 4.13 QoS enhanced distributed channel access (EDCA) Item Protocol capability References Status Support ... QD1 Support for four transmit queues with a separate channel access entity associated with each 9.2.4.2 (HCF channel access (EDCA)), 9.21.2.1 (Reference M CF32 & S1GM20.5: M CF32 & S1GM20.4:O Yes  No  N/A  QD3 Multiple transmission support 9.21.2.5 (Multiple frame in an EDCA TXOP) CF12 OR CF25(11ad) OR CF32:O Yes  No  N/A 
Change table B.4.17.1 as follows (only changed rows are shown): B. 4. 17.1 HT MAC features Item Protocol capability References Status Support ... HTM3 MPDU aggregation Yes  No  N/A  HTM3.1 Reception of A-MPDU 8.4.2.55.3 (AMPDU Parameters field), 11.4 (RSNA and integrity protocols), 9.12.2 (AMPDU length limit rules) (CF16 & not CF32):M CF32: O Yes  No  N/A  HTM3.2 A-MPDU format 8.7.1 (AMPDU format) (CF16 or CF32):M Yes  No  N/A  HTM3.3 A-MPDU contents 8.7.3 contents) (CF16 & not CF32):M CF32: M Yes  No  N/A  HTM3.4 A-MPDU frame exchange sequences 9.21.2.5 (Multiple frame in an EDCA TXOP) (CF16 & not CF32):M CF32: O Yes  No  N/A 
HTM4.4 Transmission of A-MSDUs 8.3.2.2 (Aggregate format), 8.2.4.5 (QoS Control field) (CF16 & not CF32):O Yes  No  N/A  ... HTM5.3 HT-immediate block ack(#2069) extensions 9.23.7 (HT immediate ack(#2069) extensions) (CF16 & not CF32):M CF32:O (CF32 & S1GM20.5): M Yes  No  N/A  HTM5.4 HT-delayed block ack(#2069) extensions 9.23.8 (HT delayed block ack(#2069) extensions) (CF16 & QB4.2 & not CF32):M CF32: O Yes  No  N/A  ... HTM16.2 Dual CTS protection The use of the dual CTS mechanism is deprecated.(#2190) 9.3.2.8 (Dual CTS protection) HTP2.11 & not CF32: O Yes  No  N/A  Change B.4.19 as follows (only changed rows are shown): B.4.19 WNM extensions Item Protocol capability References Status Support ... *WNM11 BSS max idle period 10.24.13 (BSS max idle period (CF19 OR CF32):M Yes  No  N/A 
Change table B.4.25 as follows (only changed rows are shown): B. 4.25.1 VHT MAC features (11ac) Item Protocol capability References Status Support ... VHTM3 Link adaptation VHTM3.1 Use of the VHT variant HT Control field for link adaptation in immediate response exchange. 8.2.4.6 (HT Control 8.3.3.14, 9.30.3 (Link adaptation using the VHT variant HT Control 9.9 HT Control field operation CF29:O CF32: O Yes  No  N/A  VHTM11 VHT single MPDU format 9.12.7 (Setting the EOF of the MPDU CF29:M CF32: M Yes  No  N/A  Add table B.4.26: B.4.26 S1G MAC features Item Protocol capability References Status Support
S1GM4.1.3 S1G Beacon reception at TBTT (CF2 & CF32): M Yes  No  N/A  S1GM4.1.4 S1G Beacon reception at TSBTT (CF2 & CF32): M Yes  No  N/A  TSF timer accuracy with S1G Beacon 10.1.3.10.3 (TSF timer accuracy with S1G Beacon) CF32: M Yes  No  N/A  S1GM4.3 TSF timer accuracy with TACK, STACK, BAT, Short Probe Response frames CF32: O Yes  No  N/A  S1GM4.4 Signaling Response Option element in Probe Request frame CF32: O Yes  No  N/A  S1GM4.5 Active scanning NDP Probe Request frame 10.1.4.3.3b (NDP Probing) CF32: O Yes  No  N/A  S1GM4.6 Sending Short Probe Response frame 10.1.4.3.4 (Sending a probe response), 10.1.4.3.4b (NDP Probing) (CF1 & CF32): O Yes  No  N/A  S1GM5 Reverse direction protocol 9.26.3 (Support for RD) CF32:O Yes  No  N/A  S1GM5.1 Initiation of RD protocol CF32:O Yes  No  N/A  Response to RD request CF32:O Yes  No  N/A  S1GM6 Target Wake Time (TWT) Operation 9.41 (Target Wake Time (TWT)) CF32:O Yes  No  N/A  S1GM6.1 Assume the role of TWT STA 9.42.1 (TWT overview) (CF32 & S1GM6):O.1 Yes  No  N/A  S1GM6.2 Assume the role of TWT Peer STA 9.42.1 (TWT overview) (CF32 & S1GM6):O.1 Yes  No  N/A  S1GM6.3 Request TWT Setup 9.42.1 (TWT overview) (CF32 & Yes  No  N/A 
S1GM7.7 Resource protection for non-TIM STAs 9.43.1 (Resource protection for non-TIM STAs) (CF1 & CF32 & Yes  No  N/A  S1GM7.8 Resource protection for non-TIM STAs using periodic RAW (PRAW) operation 9.43.1.1 (Resource protection for non-TIM STAs using periodic RAW (PRAW) operation) (CF1 & CF32 & S1GM7):O Yes  No  N/A  S1GM8 Synchronization (Sync) Operation 9.44 (Sync) Frame Operation) CF32:O Yes  No  N/A  S1GM8.1 Request for a sync transmission 9.44.1 (Sync transmission procedure for uplink traffic) (CF2 & CF32 & S1GM8):O Yes  No  N/A  S1GM8.2 Schedule a sync frame transmission (CF1 & CF32 & Yes  No  N/A  Request for time slot protection (CF2 & CF32 & S1GM8):O Yes  No  N/A  S1GM8.4 Protect the time slot assigned to the STA that requested for time slot protection. (CF1 & CF32 & Yes  No  N/A  S1GM8.5 Respond to sync frame (CF2 & CF32 & Yes  No  N/A  S1GM9 Speed frame exchange 9.45 (Speed frame exchange) CF32:O Yes  No  N/A  S1GM9.1 Act as SF Initiator 9.45.2 (Rules for SF exchange) (CF32 & S1GM9):O Yes  No  N/A  S1GM9.2 Act as SF Responder (CF32 & S1GM9):M Yes  No  N/A  S1GM10 Subchannel Selective Transmission (SST) 9.47 (Subchannel Selective Transmission (SST)) CF32:O Yes  No  N/A  S1GM11 Sectorized beam operation 9.48 (Sectorized beam operation) CF32:O Yes  No  N/A  S1GM11.1 Support for Sectorization Operation 9.48.3 (Group sectorization operation) (CF1 & CF32 & (CF2 & CF32 & S1GM11):M Yes  No  N/A  3
S1GM11.2 Support for Sectorization Operation 9.48.4 sectorization operation) (CF1 & CF32 & (CF2 & CF32 & S1GM11):M Yes  No  N/A  S1GM11.3 Transmission of S1G Sector Operation element with Sectorization Type equal to 0 9.48.2 (Sector Capabilities Exchange) (CF1 & CF32 & Yes  No  N/A  S1GM11.4 Transmission of S1G Sector Operation element with Sectorization Type field equal to 1 (CF1 & CF32 & Yes  No  N/A  S1GM11.5 Sector training operation (CF32 & S1GM11):O Yes  No  N/A  S1GM11.6 Send back Sector ID feedback to associated (CF2 & CF32 & S1GM11):O Yes  No  N/A  S1GM12 1 MHz Control Response Preamble Support 9.7.6.6 Channel selection for Control frames CF32: O Yes  No  N/A  S1GM13 Multicast AID 9.50 ( Multicast AID) CF32:O Yes  No  N/A  S1GM14 Traveling Pilot Operation 9.51 (Traveling Pilot Operation) CF32:O Yes  No  N/A  S1GM15 Bitmap Protection for NDP BlockAck frames 9.52 (Bitmap Protection for NDP BlockAck frames) (CF32 & (FT47 OR FR 48)): M Yes  No  N/A  S1GM16 Header Compression procedure 9.53 (Header Compression procedure) CF32:O Yes  No  N/A  S1GM16.1 Signaling Header Compression element in (Re-)Association Request frames (CF2 & CF32 & S1GM16):O Yes  No  N/A  S1GM16.2 Signaling Header Compression element in (Re-)Association Response frames (CF1 & CF32 & S1GM16):M Yes  No  N/A  S1GM16.3 Request header compression procedure (CF32 & S1GM16):O Yes  No  N/A  S1GM16.4 Store the optional fields indicated in the Header Compression Request (CF32 & S1GM16):O Yes  No  N/A  S1GM16.5 Send back the Header Compression Response CF32:M Yes  No  N/A  3
S1GM17 Flow control 9.56 (Flow control) CF32:M Yes  No  N/A  S1GM17.1 Request flow suspension/resumption CF32:O Yes  No  N/A  S1GM17.2 Flow suspension in response to Flow Suspend Action frame or NDP ACK frame (CF2 & CF32):M Yes  No  N/A  S1GM17.3 Flow suspension in response to STACK or BAT or TACK frame (CF2 & CF32 & Yes  No  N/A  S1GM17.4 Flow resumption upon receiving a Flow Resumption Action frame (CF2 & CF32):O Yes  No  N/A  S1GM18 Dynamic AID assignment operation 10.45 (Dynamic AID assignment operation) CF32:O Yes  No  N/A  S1GM18.1 Request AID switch (CF2 & CF32 & S1GM18):O Yes  No  N/A  S1GM18.2 Respond to request for AID switch (CF1 & CF32 & S1GM18):M Yes  No  N/A  S1GM18.3 Issue unsolicited AID switch instruction (CF1 & CF32 & S1GM18):O Yes  No  N/A  S1GM18.4 Respond to unsolicited AID switch instruction (CF2 & CF32 & S1GM18):O Yes  No  N/A  S1GM19 System information update procedure 10.46 (System information update procedure) CF32:M Yes  No  N/A  S1GM19.1 Update the Change Sequence in S1G Beacon frame (CF1 & CF32):M Yes  No  N/A  S1GM19.2 Respond to changes in the Change Sequence field in S1G Beacon frame (CF2 & CF32):M Yes  No  N/A  S1GM19.3 Respond to probe request frames that contain the Change Sequence field (CF1 & CF32):O Yes  No  N/A  S1GM20 STA types 10.48 (Sensor Only BSS) CF32:M Yes  No  N/A  S1GM20.1 Support for Sensor type STA (CF1 & CF32):O.5 Yes  No  N/A  S1GM20.2 Support for non-Sensor type STA (CF1 & CF32):O.5 Yes  No  N/A 
S1GM20.3 Support for both Sensor type and type STA (CF1 & CF32):O.5 Yes  No  N/A  S1GM20.4 Assume the role of Sensor type STA (CF2 & CF32):O.6 Yes  No  N/A  S1GM20.5 Assume the role of non-Sensor type STA (CF2 & CF32):O.6 Yes  No  N/A  S1GM21 Support for energy limited STAs 10.49 (Support for energy limited STAs) (CF1 & CF32 & (S1GM20.1 OR (CF1 & CF32 & (CF2 & CF32 & Yes  No  N/A  S1GM22 S1G Channel Access CF32: M Yes  No  N/A  S1GM22.1 Response indication deferral (RID) function 9.3.2.1 (CS mechanism), 9.3.2.4 (Setting and resetting the NAV), 9.3.2.4a (Setting and resetting the RID), 9.3.2.13 (Response Indication procedure) CF32: M Yes  No  N/A  S1GM22.2 Dynamic bandwidth operation 9.3.2.7 (CTS and DMG CTS procedure) CF32: O Yes  No  N/A  S1GM22.3 Fragment BA procedure 9.3.2.10a (Fragment BA procedure) CF32: O Yes  No  N/A  S1GM22.4 Support for only one transmit queue with AC_BE access category 9.2.4.2 (HCF ntion based channel access (EDCA)), 9.21.2.1 (Reference implementation) CF32 & S1GM20.4: M Yes  No  N/A  S1GM22.5 Restricted Access Window (RAW) Operation 9.20.5 (Restricted Access Window (RAW) Operation) CF32:O Yes  No  N/A 
S1GM23.2.2 Decode the TIM divided into page slices (CF2 & CF32 & Yes  No  N/A  S1GM24 AP power management 10.2.2.19 (AP Power management) (CF1 & CF32): O Yes  No  N/A  S1GM25 Association and reassociation 10.3 (STA authentication and association) CF32: M Yes  No  N/A  S1GM25.1 Service type indication during association 10.3.5.11 (Service type indication during association) (CF2 & CF32 & PC14):O Yes  No  N/A  S1GM25.2 Authentication Control 10.3.8 (Authentication Control) CF32: O Yes  No  N/A  S1GM25.2.1 Centralized authentication control (CF1 & CF32 & S1GM25.2): O.2 (CF2 & CF32 & S1GM25.2): O Yes  No  N/A  S1GM25.2.2 Distributed authentication control (CF1 & CF32 & S1GM25.2): O.2 (CF2 & CF32): M Yes  No  N/A  S1GM26 Robust security network association (RSNA) O Yes  No  S1GM26.1 PV1 CCMP MPDU format 11.4.3.2 (CCMP MPDU format) CF32 & ( FT51 or FR52): M Yes  No  N/A  S1GM26.2 Local construction of CCMP Header for PV1 MPDUs 11.4.3.2a (Construction of the CCMP Header for PV1 MPDUs) CF32 & FR52: M Yes  No  N/A  S1GM26.3 CCMP cryptographic encapsulation procedure for PV1 MPDUs 11.4.3.3 (CCMP cryptographic encapsulation) CF32 & FT51: M Yes  No  N/A  S1GM26.4 CCMP decapsulation procedure for PV1 11.4.3.4 (CCMP decapsulation) CF32& FR52: M Yes  No  N/A  S1GM27 Asymmetric Ack Operation 9.7.6.5.2 (Selection of a rate or MCS), 9.7.6.5.4a (MCS for asymmetric Block Ack Operation) CF32: O Yes  No  N/A 
S1GP7.40 MCS9, Nss = 4 24.1.1 & 24.5 CF1 & CF32 & S1GP7.37 & (not S1GP1.2): O CF2 & CF32: O Yes No N/A S1GP7.41 MCS10, Nss = 1 24.1.1 & 24.5 CF32: M Yes No N/A Add table B.4.28: B.4.28 features Item Protocol capability References Status Support RL1 Relay operation 9.49 (Relay operation) CF33: M Yes  No  N/A  RL2 Relay Support CF1: O Yes  No  N/A  RL3 Relay element RL1 OR RL2:M Yes  No  N/A  RL4 Signaling of Relay element in Probe Request, (Re-)Association Request frames CF33:M Yes  No  N/A  RL5 Signaling of Relay element in S1G Beacon, Probe Response, Short Probe Response frames and (Re-)Association Response frames (RL2):M Yes  No  N/A  RL6 TXOP sharing 9.49.3 (Procedures of TXOP sharing for relay operation) (CF32 & RL1):O (CF32 & RL2):O (CF2 & CF32):O Yes  No  N/A  RL6.1 Explicit Ack procedure 9.49.3.1 (ExplicitAck procedure) RL6:O.4 Yes  No  N/A  RL6.2 Implicit Ack procedure 9.49.3.2 (Implicit Ack procedure) RL6:O.4 Yes  No  N/A  RL7 Relay discovery procedure 9.49.5 (Relay discovery procedure), 10.1.4.3.4a (Active (CF32 & RL1):O CF1: O CF2: O Yes  No  N/A 