CINXE.COM

<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;max-width:60rem;padding-left:1.5rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{font-size:1.5rem;font-weight:500;line-height:2.25rem}@media (width <= 720px){.h2{font-size:1.25rem;line-height:1.5rem}}#challenge-error-text{background-image:url(data:image/svg+xml;base64,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);background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme:dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="390"></head><body class="no-js"><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt={cvId: '3',cZone: "publications.waset.org",cType: 'managed',cRay: '9197dd63a83044a9',cH: 'sPvGpZMTpldKt51wzwZ68up3NUhvBE3.imXkaXcPCP0-1740823829-1.2.1.1-MBySLlNqmTyUCvLQz_t7.qr_iYD2ZMj80BcTwj8aaawSDt7DkJyestMxN3GphfR6',cUPMDTk: "\/abstracts\/search?q=competent%20person&__cf_chl_tk=iOxe40VCojSCngieWiSPCdcioI_shnFPg2LTF060OeE-1740823829-1.0.1.1-7V3jMhhGlZavO9eQnCVjFdX20m6I0DGvHS4Tu6ke8c0",cFPWv: 'b',cITimeS: '1740823829',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/abstracts\/search?q=competent%20person&__cf_chl_f_tk=iOxe40VCojSCngieWiSPCdcioI_shnFPg2LTF060OeE-1740823829-1.0.1.1-7V3jMhhGlZavO9eQnCVjFdX20m6I0DGvHS4Tu6ke8c0",md: "dx3aqxsDutoVlF1_GpmrgbqYbXypgWccmwzYGYMQvs8-1740823829-1.2.1.1-oJxGiKTDgdhlMwWIcvfd9NvXF_MTpImmlUx.iHiwST87U3YUMhW4uat4wEYhl9OhJIgV8mH183OSLa8eogS_Jp2_dqXOsjtmnPCxIf8nZYXmRIQLmeb04E3WW36LTM.LkgVlsd6AD_rHYYAb8yKeU6AUCtfPdabSFDOVgOUWXwNRSXcdfWKsp3nsHpaY1hm0pgk8eSEJdSgn2fMtEgjV9BvgMaa1rBg4JXY5mXtgm6IMUtpwn3yDT32Lw6Sagq.QJUY797LMZiSwMV4f1hFyrNGjiMAXO1bnvWacOtu1s0nkZ6K0ksInKsiEny_N94oFdXynI5ehJ6JmnULPiDwKv8cXtVRNeSt7SVsqI4zDi8479WWOk7kUYgdeQriIsDeCtFgGr6a9eHny4aKv.o2fL4XfFKrYLkH_aSIbMD_ocL4TpSQsF5B_ooPp4YCBjKkLrhk_zDG6RxO2Xw48y8XLe_uqYXWhNsyzHWM8ZKLVw0Kl9ii7dMd_kT7b7dC8a2STSa3qs19Z9zWi4gzYqPO98gCupOkn0a85A6NPkKYH2NC_viUqvjVjqzfynVODU40hm.87IiRKpDK_YpUz.tlPPB1vrRyuzV521IDIWi.8hG2ii2A.GGel2Hb8DBzqySnTF6LmjUeI4MU_STFlMmYSMMw7zrFZCZUXL8_3afczX09X6qzq6oZsIJkVYhxqWQsUg7E9jsLccBs1oH8evtL7iw87Wu3z9Ou.BwSqAmKHT_PTx2P7s64zPJjTDbKyp8oj9n9sZNNEHdHnXzqCRMCTJ7XxCEhoy0H1XZW2oYeaHUbV__mcbi1C9GMX7Zh1F1R8yBdecCOtzddDQStFGEqXT6Gg7Vd6aBp5vX5vmRPn_haXbStA_7SXBf1iZTp7nt0FPHXk3fRjfG9qVkQqodHxqhLttZln6CdUyzzv3iwmb9SW99SO9Si81wphWUuyrtB12Fj.MHuwiBUENSnYBE1d_B6GY0EnpYOAsFuHx5ZD8RFlc7eylXvmXpMa4pDmdnk0v520wZtcMVcYbIQF3.Jzc_zyYPi1ZD5ZChVykYnTDxw1ZOJYABBB7hTNUaKzYl4xMg2EXaDv_wTE517xWPZkdWJm72X6mb5xrCzjh7bLmdykR7wa.WMhZ7T8FR3pmCpzCsUgC61h_0RIsPBFpSMQFf_8_e0p20v.Y7QywWd_lkoAAjDFwb8h9D8JKFqPeDNwGsCdoCjHR8qRlmqGR8Y0vkijVAgp0ec_j0rZisqK4K1MRswdMRWkr8C8S2QXu5hK50SrW0al9C7OR.UvtWNk3Q",mdrd: "TJPo3fnkZqgu51UWB7dHUV.PEm.dGTMaWAECoCFzTeE-1740823829-1.2.1.1-CT86kvC648buOF8kSH.g3OukfniFWgqCGxKC4otlguInH_oRF.3sxmBUTN4OJs2QVl3G6MeUMPCwaiGPWvln0hNLSEoBYnm4kC4QY0mwoNlDQz8XYb426QdqikB8_1l02BkBce_FdwvPdMBG6aRD6KOcS0Rc7OGug.Y.sA.ux5ax3G1VRJ8PBWVWiIq9SQnBNfFvZvjE9Lz6MckX1GaoEqaAC2T3RabAJ.__o3S7FJ6kth4UkntAZhd34seL3en5Vs6yPpyUxyMrXpxulDo5jX7c3kKf59Oqig_Y2ryS7bysmgl_jyTlhz3yUsdWJCjMQs6hMDp4PXFOs3MreMNzCsILv8BcyVcV9f8FI8plOivtTQCyAp4DWi6SyrPCSNYZGuOtzF9Xq5hMf4V57y_AFgZUPD0FwkaoYk8U9dYN.UVn2ISar28UcUo7l8Cgj1CMxwr3jonJ5s_Sra74Aw04DC2kDOKa_tgZmr4IgMcAzG0kxTKaQ5.1OoksQi0bGBNKQRwzUayAgKUNobrB4U6zv.97ba.aNFW9i_wMLvYMOjqoA9toL4SoS7PMdvHSLrMthQ2rXWv8ABrmpb3cz9.lgYZe60joo641wE.oOn0ekb6.zPmH7Tmh9h9eRVpXZ9ypPUB9BBASQ_QdYyG7XmcX0ra4x2x42bGVMWGue.mkF3.RzP188keGTHWH_9twP_zZOxjqmZ7Wt1sR2Cdvpai54PVs7IVe4gPqZK5D3t4QXNKhUqE7iLqXpd.5WnE6HwViuPcp6vwVVto.cpI16NKkUtVm2KXqjtLpgmwOziYDNrWpqgS6QW_seXCDLG7ip0qPi6aCBnb6RAjyacwvM7FxjBZitwPRXsNREOCbEQLfswL4ERh29N1.xtJOgjhc_ZL1M3iqLSbZ5VQxLw5ib7iF2UAMhtfNQoshx1obiCSxjZntdLjhwppNVTCK3z12sGzc0E03SfaTyjxAaiFj_DtFacV4Hjs2z8KSdyvhHjo8Dh2ahzJaFuLT7w9QawChAc0_g.OF3okA.GiW1ecB5XftMC.6bPEiI2LmJ5rOLihYVhrsi32Px10Bx6wEzrTfMYWdrClN7El3NrfdyQn7jiA6hiMqt55EwteBXCdX2ET0gVrJt66jckCz9xEQh4JsDdM14HSchYBCeqNNFMko1d08WEfpchbtGVLgADYhKRt2xzPXXkhzvsWr3d07uOa.lqG1YFDsVmUY1C7fgTBld9jJBxdb4MLW_ENy9l_9qQIzVqgDqxmzI6kTPs1bHuxy6PMqoPvoO0LqwDnETK3EBYlQaOQ71FsSj2y1Jrfn1_GFWKIFdWjF6.tpxFp.kzyB98AB_8ms8QlsrUajSeDq3eVjHbGrK_i6H.f5xB3nITT6i0z6UoFSGFimfyZVT8vhXoKKDiqqF7mBmJDxfm_We3e5WioQBxouBXy2OOUlNr.7xtJaqYAQWYYJ3RG988xuvsSUZ.bdxgdcO6lfywCR_uLos5p7ewI1V2UWbUJ8l5CsdJKDCaqyb8Gd1tepvT8is0YKqg4rkrrZXnLM2t7dzw5n1iFfOrFmDAmYtg_hciypJtbxoHKTGSeMx2KrtPVHAWP6pzETW5pmZ_mT8W.OyPoO3V93t03zb4IED7z3ll2YYUw2.g_niNtf_vjIDaC7Oa9mjRNgtGcvU1VLezoEm93_dp0NJkErqVws9Bqwj5IneziThJqDqLlzRYapRJdHvym7iTo3ggIni.sq7r5ZaOBIISGKxBYNCUDhIfc21f5_WXBhgcnGP81uWc.c3sCYqjiKx5Mnigb0RE63IOUQxQomj9DNAbGM6i_5n1L_KGFb5HVt5dwjRcQ9meL2kpyIfJ3163R7_VwcogK4wxFqrZeflKrT4TKujA9rCOMhf5hWPaMXzKRQ_r3yJhUPCOHcBNAAh95GYA6aqaWc7H4oC6qLZyn6XycWzNkXAXH7ww_H0w6yozNEUjr8KVLv3yovpEa7"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9197dd63a83044a9';window._cf_chl_opt.cOgUHash = location.hash === '' && location.href.indexOf('#') !== -1 ? '#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === '' && location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null, "\/abstracts\/search?q=competent%20person&__cf_chl_rt_tk=iOxe40VCojSCngieWiSPCdcioI_shnFPg2LTF060OeE-1740823829-1.0.1.1-7V3jMhhGlZavO9eQnCVjFdX20m6I0DGvHS4Tu6ke8c0" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>